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/tx/counties/nueces/index.md

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

data/jurisdictions/us/states/tx/counties/nueces/municipalities/corpus-christi/people/paulette-guajardo.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Paulette Guajardo"
+description: "Mayor, Corpus Christi, TX"
+role: "Mayor, Corpus Christi, TX"
+level: "municipal"
+branch: "executive"
+state: "TX"
+tenure:
+  start: "2022-01-01"
+  current: true
+ids:
+  person: "9b320df9-3eef-46e7-bce0-7c867ee8772e"
+  office: "179cb547-a770-43a2-ba96-878d5699b1f2"
+  tenure: "571b33af-1a1b-4acb-b8ff-e9b435c038e8"
+  jurisdiction: "fbacb264-10ed-42cb-a10b-421c02a4a075"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, tx]
+timestamp: "2026-07-04"
+---
+
+# Paulette Guajardo
+
+Current Mayor, Corpus Christi, TX.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).

data/jurisdictions/us/states/tx/counties/nueces/municipalities/port-aransas/people/wendy-moore.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Wendy Moore"
+description: "Mayor, Port Aransas, TX"
+role: "Mayor, Port Aransas, TX"
+level: "municipal"
+branch: "executive"
+state: "TX"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "73e86e1c-fdeb-4a17-9f9e-9e4a727f0cfb"
+  office: "2d8100e2-9485-4aa6-9b19-37741ae533e3"
+  tenure: "104bb5c5-8d41-48f4-acc4-fffe1cec7088"
+  jurisdiction: "13eaf061-5c0f-4404-a78d-22f4ac30f6e3"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, tx]
+timestamp: "2026-07-04"
+---
+
+# Wendy Moore
+
+Current Mayor, Port Aransas, TX.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).