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/madison/index.md

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

data/jurisdictions/us/states/al/counties/madison/municipalities/huntsville/people/tommy-battle.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Tommy Battle"
+description: "Mayor, Huntsville, AL"
+role: "Mayor, Huntsville, AL"
+level: "municipal"
+branch: "executive"
+state: "AL"
+tenure:
+  start: "2008-11-03"
+  current: true
+ids:
+  person: "9228e101-59e6-42f5-87c5-fd2094e30696"
+  office: "051b300c-fb39-4229-b035-b3a4a3d2b257"
+  tenure: "3d9b047d-428b-46d0-af49-0290266ccd0a"
+  jurisdiction: "e908077a-8b65-4640-b3f3-d9d678c3395b"
+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"
+---
+
+# Tommy Battle
+
+Current Mayor, Huntsville, 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/madison/municipalities/madison/people/paul-finley.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Paul Finley"
+description: "Mayor, Madison, AL"
+role: "Mayor, Madison, AL"
+level: "municipal"
+branch: "executive"
+state: "AL"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "65d0f96d-4e69-43e1-bfd7-5e873f8b8cc1"
+  office: "35eb86f4-da24-4182-9e5a-f4873c3c6c5c"
+  tenure: "96c30a63-ae62-4079-8f9c-ce60a4f3039f"
+  jurisdiction: "9c7fed67-bf8e-45ea-9baf-e1d1a8ef6d4a"
+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"
+---
+
+# Paul Finley
+
+Current Mayor, Madison, AL.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).