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/vt/counties/chittenden/index.md

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

data/jurisdictions/us/states/vt/counties/chittenden/municipalities/burlington/people/miro-weinberger.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Miro Weinberger"
+description: "Mayor, Burlington, VT"
+role: "Mayor, Burlington, VT"
+level: "municipal"
+branch: "executive"
+state: "VT"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "6fc11585-1e44-4f65-9a77-7a96d5c81042"
+  office: "6d51b07e-7d5e-4567-b93a-78d2c6fc2159"
+  tenure: "df2746d4-2888-4dd8-9bfa-0dd41c136bea"
+  jurisdiction: "26967b71-9177-429b-bf2d-2ed0ebbdca19"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, vt]
+timestamp: "2026-07-04"
+---
+
+# Miro Weinberger
+
+Current Mayor, Burlington, VT.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).

data/jurisdictions/us/states/vt/counties/chittenden/municipalities/winooski/people/kristine-lott.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Kristine Lott"
+description: "Mayor, Winooski, VT"
+role: "Mayor, Winooski, VT"
+level: "municipal"
+branch: "executive"
+state: "VT"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "54b8e203-d8a3-4045-ac84-5286f2b0ea06"
+  office: "eeafab29-ff21-440e-8be1-2631cf3cf0c4"
+  tenure: "f531daca-45c3-40a9-9d6f-8b22a1396186"
+  jurisdiction: "0353e73b-1a8d-4b85-8060-b9508ab6ee18"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, vt]
+timestamp: "2026-07-04"
+---
+
+# Kristine Lott
+
+Current Mayor, Winooski, VT.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).