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/oh/counties/fairfield/index.md

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

data/jurisdictions/us/states/oh/counties/fairfield/municipalities/lancaster/people/don-mcdaniel.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Don McDaniel"
+description: "Mayor, Lancaster, OH"
+role: "Mayor, Lancaster, OH"
+level: "municipal"
+branch: "executive"
+state: "OH"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "bde4bce3-5ba2-4fad-b6ad-25713d67170a"
+  office: "230becab-2be9-49c7-a968-01ed03a759d1"
+  tenure: "2b4c3d1f-ddf6-448a-aff7-ed1871e7115f"
+  jurisdiction: "800b2c7e-ec91-477f-b9ed-b9846590d4b3"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, oh]
+timestamp: "2026-07-04"
+---
+
+# Don McDaniel
+
+Current Mayor, Lancaster, OH.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).

data/jurisdictions/us/states/oh/counties/fairfield/municipalities/pickerington/people/lee-gray.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Lee Gray"
+description: "Mayor, Pickerington, OH"
+role: "Mayor, Pickerington, OH"
+level: "municipal"
+branch: "executive"
+state: "OH"
+tenure:
+  start: "2011-01-01"
+  current: true
+ids:
+  person: "d27cad37-bf60-4edc-80e6-7e7aa5f274a3"
+  office: "5bb52e25-327e-4de5-9ccb-e966ef5c2e9f"
+  tenure: "dd588976-b10e-41bb-90be-b5bc09ac6d56"
+  jurisdiction: "6d0b1d79-03a6-4836-87f2-644b128b41ab"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, oh]
+timestamp: "2026-07-04"
+---
+
+# Lee Gray
+
+Current Mayor, Pickerington, OH.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).