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/al/counties/etowah/index.md

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

data/jurisdictions/us/states/al/counties/etowah/municipalities/gadsden/people/craig-ford.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Craig Ford"
+description: "Mayor, Gadsden, AL"
+role: "Mayor, Gadsden, AL"
+level: "municipal"
+branch: "executive"
+state: "AL"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "c89a036f-9e24-4138-88ef-23276741a9fa"
+  office: "2fa63746-40f3-4661-9b03-5b7620333b8b"
+  tenure: "18cd407d-bc9e-4069-9bf4-11e819dd026d"
+  jurisdiction: "4a36b0b2-255b-40df-9e77-35523ae8cc88"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, al]
+timestamp: "2026-07-04"
+---
+
+# Craig Ford
+
+Current Mayor, Gadsden, AL.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).

data/jurisdictions/us/states/al/counties/etowah/municipalities/glencoe/people/chris-hare.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Chris Hare"
+description: "Mayor, Glencoe, AL"
+role: "Mayor, Glencoe, AL"
+level: "municipal"
+branch: "executive"
+state: "AL"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "dd7dc7c6-7555-4c55-852b-370d2f79e1a8"
+  office: "355339f2-7ef6-4c52-96b9-dcdc9fa6747a"
+  tenure: "89136a25-5cb5-41d5-9fc4-2bd7ba80b19a"
+  jurisdiction: "7fa35bdd-c4a3-4dab-b18a-bed33f42d13b"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, al]
+timestamp: "2026-07-04"
+---
+
+# Chris Hare
+
+Current Mayor, Glencoe, AL.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).