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/grayson/index.md

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

data/jurisdictions/us/states/tx/counties/grayson/municipalities/denison/people/janet-gott.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Janet Gott"
+description: "Mayor, Denison, TX"
+role: "Mayor, Denison, TX"
+level: "municipal"
+branch: "executive"
+state: "TX"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "89978bc8-6efc-4fde-b9c5-777d03eac046"
+  office: "4a09ba1a-d4a6-45b8-bdaa-d9dfd975088a"
+  tenure: "ce7378fa-95b3-413d-969a-afe7da56b6cc"
+  jurisdiction: "e1832ce9-00fa-462a-b377-acae6e2dbc25"
+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"
+---
+
+# Janet Gott
+
+Current Mayor, Denison, 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/grayson/municipalities/sherman/people/shawn-teamann.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Shawn Teamann"
+description: "Mayor, Sherman, TX"
+role: "Mayor, Sherman, TX"
+level: "municipal"
+branch: "executive"
+state: "TX"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "25aad3f2-f7a4-4b11-bec0-0d7d6078427b"
+  office: "f0f57033-c989-4a6c-b9f6-9cbc2af1a1a1"
+  tenure: "800dc1e3-663d-4f88-a49a-d79607e8bdfd"
+  jurisdiction: "37990a94-395e-4dba-a375-9b21bec2827f"
+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"
+---
+
+# Shawn Teamann
+
+Current Mayor, Sherman, TX.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).