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/medina/index.md

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

data/jurisdictions/us/states/oh/counties/medina/municipalities/brunswick/people/ron-falconi.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Ron Falconi"
+description: "Mayor, Brunswick, OH"
+role: "Mayor, Brunswick, OH"
+level: "municipal"
+branch: "executive"
+state: "OH"
+tenure:
+  start: "2014-01-01"
+  current: true
+ids:
+  person: "25a58265-3f75-48b5-9bbb-3a5114be037e"
+  office: "719cfebb-c134-499f-8b82-bcabf777ab34"
+  tenure: "08f075b6-9367-4f06-9846-cb2ab04de910"
+  jurisdiction: "6a4810e9-dc60-4a95-9bb5-2ddacc63a24f"
+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"
+---
+
+# Ron Falconi
+
+Current Mayor, Brunswick, 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/medina/municipalities/medina/people/dennis-hanwell.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Dennis Hanwell"
+description: "Mayor, Medina, OH"
+role: "Mayor, Medina, OH"
+level: "municipal"
+branch: "executive"
+state: "OH"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "be09832d-95a1-43fe-9d7c-7c37e4164fd5"
+  office: "45a22aca-2734-458a-8c72-1dbec87313e0"
+  tenure: "19a3e221-33ac-47e3-91f3-56e8c4a41d21"
+  jurisdiction: "a9a18dff-f712-4a08-9668-a86a9603c90e"
+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"
+---
+
+# Dennis Hanwell
+
+Current Mayor, Medina, OH.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).