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/ny/counties/erie/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # Erie County, NY
 
-County jurisdiction.
+County jurisdiction — 3 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/ny/counties/erie/municipalities/buffalo/people/byron-brown.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Byron Brown"
+description: "Mayor, Buffalo, NY"
+role: "Mayor, Buffalo, NY"
+level: "municipal"
+branch: "executive"
+state: "NY"
+tenure:
+  start: "2006-01-01"
+  current: true
+ids:
+  person: "c0138b77-3fe1-4f7a-ad29-8b51beac30cf"
+  office: "c1f8e746-f0ab-4cdd-936d-d279a16c153f"
+  tenure: "b5467a77-2a2a-44a7-a4f4-01438acc629c"
+  jurisdiction: "cb4ded34-ec38-4bdf-bc0f-b6de4d87d7e7"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, ny]
+timestamp: "2026-07-04"
+---
+
+# Byron Brown
+
+Current Mayor, Buffalo, NY.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).

data/jurisdictions/us/states/ny/counties/erie/municipalities/lackawanna/people/annette-iafallo.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "Annette Iafallo"
+description: "Mayor, Lackawanna, NY"
+role: "Mayor, Lackawanna, NY"
+level: "municipal"
+branch: "executive"
+state: "NY"
+tenure:
+  start: "2020-01-01"
+  current: true
+ids:
+  person: "0506144e-03a7-4a08-a286-20f216265a96"
+  office: "fecbbc95-22a4-4d5b-9427-c49d4f83fb59"
+  tenure: "9af3fa28-ab01-4d64-b306-c3ec5c4ef6c0"
+  jurisdiction: "2157370b-c73c-47a8-99a0-39775c31027f"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, ny]
+timestamp: "2026-07-04"
+---
+
+# Annette Iafallo
+
+Current Mayor, Lackawanna, NY.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).

data/jurisdictions/us/states/ny/counties/erie/municipalities/tonawanda/people/john-white.md

@@ -0,0 +1,39 @@
+---
+type: Person
+title: "John White"
+description: "Mayor, Tonawanda, NY"
+role: "Mayor, Tonawanda, NY"
+level: "municipal"
+branch: "executive"
+state: "NY"
+tenure:
+  start: "2026-06-20"
+  current: true
+ids:
+  person: "dedc4213-bd61-4616-bd64-aeee648bd0dc"
+  office: "129646b0-3aba-43d0-b63f-3054ce9b7b4d"
+  tenure: "76673c40-5985-4eb0-8405-4c7172e046eb"
+  jurisdiction: "e2a9fa71-6428-461a-a2f9-b647b427475c"
+sources:
+  - field: office
+    source: "Wikidata"
+  - field: tenure
+    source: "Wikidata"
+  - field: jurisdiction
+    source: "Census TIGER 2024"
+confidence: official
+tags: [officeholder, municipal, executive, ny]
+timestamp: "2026-07-04"
+---
+
+# John White
+
+Current Mayor, Tonawanda, NY.
+
+## Sources
+
+- office: Wikidata
+- tenure: Wikidata
+- jurisdiction: Census TIGER 2024
+
+Generated from the Atlas officeholders v3 export (2026-07-04).