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/ga/counties/cherokee/index.md

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

data/jurisdictions/us/states/ga/counties/cherokee/municipalities/canton/people/bill-grant.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Bill Grant"
+description: "Mayor, Canton, GA"
+role: "Mayor, Canton, GA"
+level: "municipal"
+branch: "executive"
+state: "GA"
+tenure:
+  start: "2023-12-01"
+  current: true
+ids:
+  person: "b675b33e-f4bd-4ced-9ee8-3122335a7b6f"
+  office: "487e7851-7d03-4a16-80f0-ea3c045e3a6c"
+  tenure: "d6117cef-a42e-438b-916b-aa8d11c4ce16"
+  jurisdiction: "f2fcbcaf-4664-4add-be4a-d2403a570fe8"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, ga]
+timestamp: "2026-07-04"
+---
+
+# Bill Grant
+
+Current Mayor, Canton, GA.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).

data/jurisdictions/us/states/ga/counties/cherokee/municipalities/woodstock/people/michael-caldwell.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Michael Caldwell"
+description: "Mayor, Woodstock, GA"
+role: "Mayor, Woodstock, GA"
+level: "municipal"
+branch: "executive"
+state: "GA"
+tenure:
+  start: "2022-01-01"
+  current: true
+ids:
+  person: "456e64b0-d46f-4dfc-8e8e-2c38d8e07201"
+  office: "e198a6a9-95fd-42c6-ba7b-0e5c6cc2fa3a"
+  tenure: "3b9b8127-0670-4c73-b9f8-1252740981db"
+  jurisdiction: "a87c850a-803e-4e60-9173-5fb15cd4a0aa"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, ga]
+timestamp: "2026-07-04"
+---
+
+# Michael Caldwell
+
+Current Mayor, Woodstock, GA.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).