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/ks/counties/leavenworth/index.md

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

data/jurisdictions/us/states/ks/counties/leavenworth/municipalities/lansing/people/tony-mcneill.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Tony McNeill"
+description: "Mayor, Lansing, KS"
+role: "Mayor, Lansing, KS"
+level: "municipal"
+branch: "executive"
+state: "KS"
+tenure:
+  start: "2020-01-01"
+  current: true
+ids:
+  person: "0f96e6b3-bec2-4569-bec0-e4155e3eeb13"
+  office: "ceed1c78-f128-4b18-a69f-4901af1eaee8"
+  tenure: "da2c7837-f9ac-4917-a526-e4c0ea4c23bd"
+  jurisdiction: "be9e1d64-4bd2-468a-910a-f1f549d5a0fd"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, ks]
+timestamp: "2026-07-04"
+---
+
+# Tony McNeill
+
+Current Mayor, Lansing, KS.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).

data/jurisdictions/us/states/ks/counties/leavenworth/municipalities/leavenworth/people/griff-martin.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Griff Martin"
+description: "Mayor, Leavenworth, KS"
+role: "Mayor, Leavenworth, KS"
+level: "municipal"
+branch: "executive"
+state: "KS"
+tenure:
+  start: "2021-12-07"
+  current: true
+ids:
+  person: "161a7bc8-4a32-4239-8090-b6bd85ad18d2"
+  office: "f4579527-0e61-4818-a91b-664b0a364d5c"
+  tenure: "8e28acc2-5e64-4991-8fb7-48b4eafc9b07"
+  jurisdiction: "3cb3d57e-894d-4f51-9e2a-706c50e807bd"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, ks]
+timestamp: "2026-07-04"
+---
+
+# Griff Martin
+
+Current Mayor, Leavenworth, KS.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).