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/nh/counties/hillsborough/index.md

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

data/jurisdictions/us/states/nh/counties/hillsborough/municipalities/manchester/people/joyce-craig.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Joyce Craig"
+description: "Mayor, Manchester, NH"
+role: "Mayor, Manchester, NH"
+level: "municipal"
+branch: "executive"
+state: "NH"
+tenure:
+  start: "2018-01-01"
+  current: true
+ids:
+  person: "69ae15bd-7584-4dfc-94a3-1415340ad56b"
+  office: "3d8bc3b8-71db-46d5-b9d6-4ff1b7327ccb"
+  tenure: "2cf4b5d9-c3cd-4f5f-8eef-ef1966c69937"
+  jurisdiction: "bb001d29-063d-4f2e-985d-54511bb0281f"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, nh]
+timestamp: "2026-07-04"
+---
+
+# Joyce Craig
+
+Current Mayor, Manchester, NH.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).

data/jurisdictions/us/states/nh/counties/hillsborough/municipalities/nashua/people/james-w-donchess.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "James W. Donchess"
+description: "Mayor, Nashua, NH"
+role: "Mayor, Nashua, NH"
+level: "municipal"
+branch: "executive"
+state: "NH"
+tenure:
+  start: "2016-01-01"
+  current: true
+ids:
+  person: "a9a42040-bf2f-4982-aaf8-73668c4a0c29"
+  office: "d9e2bc3e-1822-4a77-8350-918d8bebe5a8"
+  tenure: "7ad0d792-2ef6-4bb7-9c91-f0e030aa4dba"
+  jurisdiction: "a7134e02-9a77-4617-97a3-544471c53952"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, nh]
+timestamp: "2026-07-04"
+---
+
+# James W. Donchess
+
+Current Mayor, Nashua, NH.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).