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/nj/counties/cape-may/index.md

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

data/jurisdictions/us/states/nj/counties/cape-may/municipalities/cape-may/people/zack-mullock.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Zack Mullock"
+description: "Mayor, Cape May, NJ"
+role: "Mayor, Cape May, NJ"
+level: "municipal"
+branch: "executive"
+state: "NJ"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "a599fd1e-0397-4156-aa13-43ea5b5e90bd"
+  office: "96848ca2-bdcc-4f2d-92af-15ffdc1e2e8c"
+  tenure: "1e4e0d09-b347-4341-ba8a-2c4f0d7eb0d2"
+  jurisdiction: "5b802a91-4d8c-4760-804b-e6370bbef686"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, nj]
+timestamp: "2026-07-04"
+---
+
+# Zack Mullock
+
+Current Mayor, Cape May, NJ.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).

data/jurisdictions/us/states/nj/counties/cape-may/municipalities/ocean-city/people/jay-a-gillian.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Jay A. Gillian"
+description: "Mayor, Ocean City, NJ"
+role: "Mayor, Ocean City, NJ"
+level: "municipal"
+branch: "executive"
+state: "NJ"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "9a70a82c-def3-4aa9-b83a-c76098377849"
+  office: "96c0a2d3-d289-4c76-a681-90bf0dcd9f60"
+  tenure: "f9c9463f-3c1f-449b-ad97-82ac942313c9"
+  jurisdiction: "0a3876c9-90c4-4ba8-94dd-308decd3c0b7"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, nj]
+timestamp: "2026-07-04"
+---
+
+# Jay A. Gillian
+
+Current Mayor, Ocean City, NJ.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).