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/or/counties/clatsop/index.md

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

data/jurisdictions/us/states/or/counties/clatsop/municipalities/astoria/people/bruce-jones.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Bruce Jones"
+description: "Mayor, Astoria, OR"
+role: "Mayor, Astoria, OR"
+level: "municipal"
+branch: "executive"
+state: "OR"
+tenure:
+  start: "2019-01-01"
+  current: true
+ids:
+  person: "36a16aba-c426-423a-9d12-d44250e12635"
+  office: "40a4e5a1-78b8-498f-bcb8-4f907d09c66d"
+  tenure: "9131f626-aa02-44f6-9200-c834c1b2cbb0"
+  jurisdiction: "c92801c2-a517-494c-80d7-beac29ae299e"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, or]
+timestamp: "2026-07-04"
+---
+
+# Bruce Jones
+
+Current Mayor, Astoria, OR.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).

data/jurisdictions/us/states/or/counties/clatsop/municipalities/cannon-beach/people/sam-steidel.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Sam Steidel"
+description: "Mayor, Cannon Beach, OR"
+role: "Mayor, Cannon Beach, OR"
+level: "municipal"
+branch: "executive"
+state: "OR"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "c2375b73-a9d0-4490-9b2a-bfd6c7f362e2"
+  office: "294c7e7f-9970-47bd-9a38-476cf9a9ef98"
+  tenure: "7ab265c5-ffcd-4184-8447-9684958bcb82"
+  jurisdiction: "81b46acf-c4e5-4b1e-b34f-2585c0aff654"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, or]
+timestamp: "2026-07-04"
+---
+
+# Sam Steidel
+
+Current Mayor, Cannon Beach, OR.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).