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/va/counties/manassas-park-city/index.md

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

data/jurisdictions/us/states/va/counties/manassas-park-city/municipalities/manassas-park/people/jeanette-rishell.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Jeanette Rishell"
+description: "Mayor, Manassas Park, VA"
+role: "Mayor, Manassas Park, VA"
+level: "municipal"
+branch: "executive"
+state: "VA"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "953f3c57-f9d2-4617-8558-5e40bef84fa4"
+  office: "d4ab8a45-32a4-4dfb-9a15-af2978fb4e61"
+  tenure: "171a0231-76d5-4dcd-be40-659c38e2ae58"
+  jurisdiction: "e7b6c846-ce52-4524-9aa7-5d6141c247c5"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, va]
+timestamp: "2026-07-04"
+---
+
+# Jeanette Rishell
+
+Current Mayor, Manassas Park, VA.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).

data/jurisdictions/us/states/va/counties/manassas-park-city/municipalities/manassas-park/people/michelle-davis-younger.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Michelle Davis-Younger"
+description: "Mayor, Manassas, VA — Manassas Park"
+role: "Mayor, Manassas, VA"
+level: "municipal"
+branch: "executive"
+state: "VA"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "a18e779d-8a26-44ab-b993-504fb7e4f657"
+  office: "cee65d10-6d9b-4996-98cd-e2a115bb0b52"
+  tenure: "bdc841e1-9956-4274-bb90-8831954d6ce9"
+  jurisdiction: "edc13402-8cd9-4c26-bf5d-5343c99bb274"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, va]
+timestamp: "2026-07-04"
+---
+
+# Michelle Davis-Younger
+
+Current Mayor, Manassas, VA (Manassas Park).
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).