Municipals: nest 1,823 city officeholders under their real counties

Pull Atlas's place→county crosswalk (Census TIGER 2024 places × county
geometries, 32,041 places) into the build as a committed raw input, and
use it to resolve municipal officeholders whose county was unknown.

- data/place_county_crosswalk.jsonl — new raw input (place_geoid → county_geoid)
- build.py — place-name+state → county_geoid → ACS county slug as a fallback
  in county_slug(); city_slug() generalized to non-FL bare place labels
- data/sources/sources.yaml — provenance entry for the crosswalk

_unresolved municipals: 1919 → 58. The remainder are genuine: CT planning
regions (post-county), county-level rows mislabeled municipal upstream,
consolidated city-counties (null label), Wikidata-QID placeholder names,
and ambiguous same-name places — left unresolved rather than guessed.

Join key is county_geoid (5-digit FIPS); the directory slug is taken from
the ACS county node so municipals nest under the exact existing county dir.
Deterministic (byte-identical rebuild); validate.py passes 19,721 records.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

data/jurisdictions/us/states/or/counties/coos/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # Coos County, OR
 
-County jurisdiction.
+County jurisdiction — 2 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/or/counties/coos/municipalities/coos-bay/people/joe-benetti.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Joe Benetti"
+description: "Mayor, Coos Bay, OR"
+role: "Mayor, Coos Bay, OR"
+level: "municipal"
+branch: "executive"
+state: "OR"
+tenure:
+  start: "2016-11-01"
+  current: true
+ids:
+  person: "ae0fa4bf-0614-4a1e-808c-87216d0e4500"
+  office: "0a215b2a-652d-4ae0-96e6-fa73318abe10"
+  tenure: "fd2ac06f-4f04-4d75-886b-438bc8bd8406"
+  jurisdiction: "3b09fa30-3f81-4adc-b07c-12a5baa9fdaa"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, or]
+timestamp: "2026-07-04"
+---
+
+# Joe Benetti
+
+Current Mayor, Coos Bay, OR.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).

data/jurisdictions/us/states/or/counties/coos/municipalities/coquille/people/sam-flaherty.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Sam Flaherty"
+description: "Mayor, Coquille, OR"
+role: "Mayor, Coquille, OR"
+level: "municipal"
+branch: "executive"
+state: "OR"
+tenure:
+  start: "2021-01-01"
+  current: true
+ids:
+  person: "d3247980-60fc-466a-a346-b57f253380fe"
+  office: "2070c279-a29b-4725-9724-ee6cdd389dbe"
+  tenure: "35ef7a20-7a8e-43b4-8103-1d6d861b5a4b"
+  jurisdiction: "dcc0207e-bb71-4a2d-861d-dc33268c0bb0"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, or]
+timestamp: "2026-07-04"
+---
+
+# Sam Flaherty
+
+Current Mayor, Coquille, OR.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).