Add elections + demographics layer: candidates and jurisdictions

Two new entity types, built deterministically from the raw exports:

  Candidate (2,494)     — 2026 federal candidates as files under
                          us/states/<st>/candidates/, with office,
                          district, party, incumbent/challenger stance,
                          campaign committee, FEC id.

  Jurisdiction (3,494)  — demographic nodes carrying ACS 2023 data:
                          3,131 counties (deduped from 3,231 mixed-format
                          fips keys) + 363 congressional districts.

This completes the county skeleton nationwide: every US county is now a
browsable node with population, income, poverty, race, education and
housing — even where no officeholders are mapped yet. In Florida the
county index.md merges into the existing dir and reports its officeholder
count alongside demographics (St. Lucie: 33 officeholders + ACS profile).

build.py now reads seven raw inputs in one deterministic pass
(byte-identical on rerun). The mirror now answers: who holds power, who
runs this institution, who is running, and what each place is made of.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

data/jurisdictions/us/states/dc/candidates/brooke-pinto.md

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+---
+type: Candidate
+title: "Brooke Pinto"
+description: "U.S. House candidate, DC-00 (2026)"
+office: "U.S. House"
+state: "DC"
+district: "DC-00"
+party: "DEM"
+stance: "open-seat"
+election_year: 2026
+status: "statutory candidate"
+committee:
+  name: "BROOKE PINTO FOR CONGRESS"
+  id: "C00922369"
+ids:
+  fec: "H6DC00196"
+sources:
+  - field: filing
+    source: FEC (Federal Election Commission)
+confidence: official
+tags: [candidate, federal, house, dc]
+timestamp: "2026-07-03"
+---
+
+# Brooke Pinto
+
+Democratic open-seat for U.S. House (DC-00), 2026.
+
+## Campaign Committee
+
+- BROOKE PINTO FOR CONGRESS (C00922369)
+
+## Source
+
+- filing: FEC (Federal Election Commission)
+
+Federal candidate filing; not yet linked to an officeholder record.

data/jurisdictions/us/states/dc/candidates/denise-ms-rosado.md

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+---
+type: Candidate
+title: "Denise Ms. Rosado"
+description: "U.S. House candidate, DC-00 (2026)"
+office: "U.S. House"
+state: "DC"
+district: "DC-00"
+party: "REP"
+stance: "open-seat"
+election_year: 2026
+status: "statutory candidate"
+committee:
+  name: "ROSADO FOR CONGRESS"
+  id: "C00934083"
+ids:
+  fec: "H6DC01111"
+sources:
+  - field: filing
+    source: FEC (Federal Election Commission)
+confidence: official
+tags: [candidate, federal, house, dc]
+timestamp: "2026-07-03"
+---
+
+# Denise Ms. Rosado
+
+Republican open-seat for U.S. House (DC-00), 2026.
+
+## Campaign Committee
+
+- ROSADO FOR CONGRESS (C00934083)
+
+## Source
+
+- filing: FEC (Federal Election Commission)
+
+Federal candidate filing; not yet linked to an officeholder record.

data/jurisdictions/us/states/dc/candidates/eleanor-holmes-norton.md

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+---
+type: Candidate
+title: "Eleanor Holmes Norton"
+description: "U.S. House candidate, DC-00 (2026)"
+office: "U.S. House"
+state: "DC"
+district: "DC-00"
+party: "DEM"
+stance: "incumbent"
+election_year: 2026
+status: "statutory candidate"
+committee:
+  name: "CITIZENS FOR ELEANOR HOLMES NORTON"
+  id: "C00244335"
+ids:
+  fec: "H0DC00058"
+sources:
+  - field: filing
+    source: FEC (Federal Election Commission)
+confidence: official
+tags: [candidate, federal, house, dc]
+timestamp: "2026-07-03"
+---
+
+# Eleanor Holmes Norton
+
+Democratic incumbent for U.S. House (DC-00), 2026.
+
+## Campaign Committee
+
+- CITIZENS FOR ELEANOR HOLMES NORTON (C00244335)
+
+## Source
+
+- filing: FEC (Federal Election Commission)
+
+Federal candidate filing; not yet linked to an officeholder record.

data/jurisdictions/us/states/dc/candidates/gordon-chaffin.md

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+---
+type: Candidate
+title: "Gordon Chaffin"
+description: "U.S. House candidate, DC-00 (2026)"
+office: "U.S. House"
+state: "DC"
+district: "DC-00"
+party: "DEM"
+stance: "open-seat"
+election_year: 2026
+status: "statutory candidate"
+committee:
+  name: "GORDON CHAFFIN FOR CONGRESS"
+  id: "C00915686"
+ids:
+  fec: "H6DC01038"
+sources:
+  - field: filing
+    source: FEC (Federal Election Commission)
+confidence: official
+tags: [candidate, federal, house, dc]
+timestamp: "2026-07-03"
+---
+
+# Gordon Chaffin
+
+Democratic open-seat for U.S. House (DC-00), 2026.
+
+## Campaign Committee
+
+- GORDON CHAFFIN FOR CONGRESS (C00915686)
+
+## Source
+
+- filing: FEC (Federal Election Commission)
+
+Federal candidate filing; not yet linked to an officeholder record.

data/jurisdictions/us/states/dc/candidates/gregory-dr-jaczko.md

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+---
+type: Candidate
+title: "Gregory Dr. Jaczko"
+description: "U.S. House candidate, DC-00 (2026)"
+office: "U.S. House"
+state: "DC"
+district: "DC-00"
+party: "DEM"
+stance: "open-seat"
+election_year: 2026
+status: "statutory candidate"
+committee:
+  name: "GREG JACZKO FOR CONGRESS"
+  id: "C00938381"
+ids:
+  fec: "H6DC01137"
+sources:
+  - field: filing
+    source: FEC (Federal Election Commission)
+confidence: official
+tags: [candidate, federal, house, dc]
+timestamp: "2026-07-03"
+---
+
+# Gregory Dr. Jaczko
+
+Democratic open-seat for U.S. House (DC-00), 2026.
+
+## Campaign Committee
+
+- GREG JACZKO FOR CONGRESS (C00938381)
+
+## Source
+
+- filing: FEC (Federal Election Commission)
+
+Federal candidate filing; not yet linked to an officeholder record.

data/jurisdictions/us/states/dc/candidates/kelly-williams.md

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+---
+type: Candidate
+title: "Kelly Williams"
+description: "U.S. House candidate, DC-00 (2026)"
+office: "U.S. House"
+state: "DC"
+district: "DC-00"
+party: "DEM"
+election_year: 2026
+status: "statutory candidate"
+committee:
+  name: "KELLY MIKEL FOR DC"
+  id: "C00853739"
+ids:
+  fec: "H2DC01029"
+sources:
+  - field: filing
+    source: FEC (Federal Election Commission)
+confidence: official
+tags: [candidate, federal, house, dc]
+timestamp: "2026-07-03"
+---
+
+# Kelly Williams
+
+Democratic candidate for U.S. House (DC-00), 2026.
+
+## Campaign Committee
+
+- KELLY MIKEL FOR DC (C00853739)
+
+## Source
+
+- filing: FEC (Federal Election Commission)
+
+Federal candidate filing; not yet linked to an officeholder record.

data/jurisdictions/us/states/dc/candidates/kinney-zalesne.md

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+---
+type: Candidate
+title: "Kinney Zalesne"
+description: "U.S. House candidate, DC-00 (2026)"
+office: "U.S. House"
+state: "DC"
+district: "DC-00"
+party: "DEM"
+stance: "open-seat"
+election_year: 2026
+status: "statutory candidate"
+committee:
+  name: "KINNEY FOR DC"
+  id: "C00911842"
+ids:
+  fec: "H6DC00170"
+sources:
+  - field: filing
+    source: FEC (Federal Election Commission)
+confidence: official
+tags: [candidate, federal, house, dc]
+timestamp: "2026-07-03"
+---
+
+# Kinney Zalesne
+
+Democratic open-seat for U.S. House (DC-00), 2026.
+
+## Campaign Committee
+
+- KINNEY FOR DC (C00911842)
+
+## Source
+
+- filing: FEC (Federal Election Commission)
+
+Federal candidate filing; not yet linked to an officeholder record.

data/jurisdictions/us/states/dc/candidates/robert-c-jr-white.md

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+---
+type: Candidate
+title: "Robert C. Jr. White"
+description: "U.S. House candidate, DC-00 (2026)"
+office: "U.S. House"
+state: "DC"
+district: "DC-00"
+party: "DEM"
+stance: "open-seat"
+election_year: 2026
+status: "statutory candidate"
+committee:
+  name: "THE CONGRESSIONAL COMMITTEE TO ELECT ROBERT WHITE 2026"
+  id: "C00921502"
+ids:
+  fec: "H6DC01079"
+sources:
+  - field: filing
+    source: FEC (Federal Election Commission)
+confidence: official
+tags: [candidate, federal, house, dc]
+timestamp: "2026-07-03"
+---
+
+# Robert C. Jr. White
+
+Democratic open-seat for U.S. House (DC-00), 2026.
+
+## Campaign Committee
+
+- THE CONGRESSIONAL COMMITTEE TO ELECT ROBERT WHITE 2026 (C00921502)
+
+## Source
+
+- filing: FEC (Federal Election Commission)
+
+Federal candidate filing; not yet linked to an officeholder record.

data/jurisdictions/us/states/dc/candidates/robert-matthews.md

@@ -0,0 +1,37 @@
+---
+type: Candidate
+title: "Robert Matthews"
+description: "U.S. House candidate, DC-00 (2026)"
+office: "U.S. House"
+state: "DC"
+district: "DC-00"
+party: "DEM"
+stance: "open-seat"
+election_year: 2026
+status: "statutory candidate"
+committee:
+  name: "FRIENDS OF MATTHEWS FOR CONGRESS"
+  id: "C00918987"
+ids:
+  fec: "H6DC01053"
+sources:
+  - field: filing
+    source: FEC (Federal Election Commission)
+confidence: official
+tags: [candidate, federal, house, dc]
+timestamp: "2026-07-03"
+---
+
+# Robert Matthews
+
+Democratic open-seat for U.S. House (DC-00), 2026.
+
+## Campaign Committee
+
+- FRIENDS OF MATTHEWS FOR CONGRESS (C00918987)
+
+## Source
+
+- filing: FEC (Federal Election Commission)
+
+Federal candidate filing; not yet linked to an officeholder record.

data/jurisdictions/us/states/dc/candidates/trent-william-holbrook.md

@@ -0,0 +1,37 @@
+---
+type: Candidate
+title: "Trent William Holbrook"
+description: "U.S. House candidate, DC-00 (2026)"
+office: "U.S. House"
+state: "DC"
+district: "DC-00"
+party: "DEM"
+stance: "open-seat"
+election_year: 2026
+status: "statutory candidate"
+committee:
+  name: "FRIENDS OF TRENT HOLBROOK"
+  id: "C00932921"
+ids:
+  fec: "H6DC01103"
+sources:
+  - field: filing
+    source: FEC (Federal Election Commission)
+confidence: official
+tags: [candidate, federal, house, dc]
+timestamp: "2026-07-03"
+---
+
+# Trent William Holbrook
+
+Democratic open-seat for U.S. House (DC-00), 2026.
+
+## Campaign Committee
+
+- FRIENDS OF TRENT HOLBROOK (C00932921)
+
+## Source
+
+- filing: FEC (Federal Election Commission)
+
+Federal candidate filing; not yet linked to an officeholder record.