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/jefferson/index.md

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

data/jurisdictions/us/states/oh/counties/jefferson/municipalities/steubenville/people/jerry-barilla.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Jerry Barilla"
+description: "Mayor, Steubenville, OH"
+role: "Mayor, Steubenville, OH"
+level: "municipal"
+branch: "executive"
+state: "OH"
+tenure:
+  start: "2018-01-01"
+  current: true
+ids:
+  person: "c5b767a8-67be-418f-9500-bcd79a3476be"
+  office: "7e60f5b9-6ace-4718-af3b-5a881f9c29ad"
+  tenure: "75f786a5-c134-42a3-a3e9-2479b4bfb70c"
+  jurisdiction: "e2c7e3ab-f5e9-4acd-9c2f-412f42f0aba8"
+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"
+---
+
+# Jerry Barilla
+
+Current Mayor, Steubenville, 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/jefferson/municipalities/toronto/people/john-parker.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "John Parker"
+description: "Mayor, Toronto, OH"
+role: "Mayor, Toronto, OH"
+level: "municipal"
+branch: "executive"
+state: "OH"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "73ddf36c-9060-4000-a323-6070a5e441b9"
+  office: "f569cb4e-dff5-42ba-8213-8f9f79c47da6"
+  tenure: "06b6c995-f0d1-4fe8-b1cd-92008cf1fa85"
+  jurisdiction: "ad7adbb6-3b55-495b-a0b4-037012f6a515"
+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"
+---
+
+# John Parker
+
+Current Mayor, Toronto, OH.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).