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/wa/counties/yakima/index.md

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

data/jurisdictions/us/states/wa/counties/yakima/municipalities/sunnyside/people/dean-r-broersma.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Dean R. Broersma"
+description: "Mayor, Sunnyside, WA"
+role: "Mayor, Sunnyside, WA"
+level: "municipal"
+branch: "executive"
+state: "WA"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "c0d243b4-f2e1-4880-86a9-c39d2feaedc4"
+  office: "39a910b8-4034-4c0c-964c-d7ae96bea0b7"
+  tenure: "d665820a-734f-4a81-bf21-e6feafee75fa"
+  jurisdiction: "8a298476-1702-48e7-b9fd-6e6cb4194996"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, wa]
+timestamp: "2026-07-04"
+---
+
+# Dean R. Broersma
+
+Current Mayor, Sunnyside, WA.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).

data/jurisdictions/us/states/wa/counties/yakima/municipalities/yakima/people/patricia-byers.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Patricia Byers"
+description: "Mayor, Yakima, WA"
+role: "Mayor, Yakima, WA"
+level: "municipal"
+branch: "executive"
+state: "WA"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "4f4d9853-4a8a-42d8-822c-2ef160a0b3fa"
+  office: "bae206ae-6562-4ff8-bfe2-1dbba161ca02"
+  tenure: "33568e45-e044-417c-a967-d34fac0e1eb9"
+  jurisdiction: "ed332f1d-d74e-478e-94c2-e227a5c3be42"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, wa]
+timestamp: "2026-07-04"
+---
+
+# Patricia Byers
+
+Current Mayor, Yakima, WA.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).