feat(postcodes/IT): bulk-import 4,678 CAP codes via Istat (#1039)#1436
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Adds the importer + first run for Italy. Uses the matteocontrini/comuni-json mirror of Istat's official Italian commune list with postcodes (CAP). 1. bin/scripts/sync/import_italy_postcodes.py — pipeline reading the community-maintained UTF-8 JSON. Each commune has a cap[] array (large cities like Rome have 80+ CAPs); pipeline expands one row per (cap, commune) and picks first commune alphabetically as canonical per code. State resolution is direct sigla -> state.iso2 match (RM=Rome, MI=Milan, etc.) with one alias bridge: Aosta uses sigla 'AO' but states.json has it as the 'Aosta Valley' autonomous region with iso2 '23'. 2. contributions/postcodes/IT.json — 4,678 unique CAPs covering all 7,904 comuni with 100% state_id resolution. Multi-CAP cities - Rome: 82 CAPs - Venice: 56 - Messina: 48 - Genoa: 47 - Milan: 42 - Each CAP gets one record pointing to the canonical commune name; this matches the Tier-4 "one row per code" contract from #1398. Validation (zero errors across 4,678 records) - All codes match countries.postal_code_regex (^(\\d{5})\$) - All FKs resolve, all state_codes agree with state.iso2 - No auto-managed fields present License & attribution - Upstream: Istat (CC-BY 3.0) - Mirror: github.com/matteocontrini/comuni-json - Each row: source: "istat" Refs: #1039 Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
Adds Italian postcodes via the matteocontrini/comuni-json mirror of Istat's official commune list with CAP.
bin/scripts/sync/import_italy_postcodes.py— pipeline expanding each commune'scap[]array to one record per (cap, commune), picking first-alphabetical commune per unique CAP. State resolution by sigla → state.iso2 with one alias bridge (AostaAO→23).contributions/postcodes/IT.json— 4,678 unique CAPs across all 7,904 comuni, 100% state_id resolution.Multi-CAP cities
Each CAP gets one record pointing to the canonical commune (matches the Tier-4 "one row per code" contract from #1398).
Validation (zero errors across 4,678 records)
state_idresolved^(\d{5})$state_code↔state.iso2agreementLicense
github.com/matteocontrini/comuni-jsonsource: "istat"Cumulative postcode coverage after this lands
~223,000 postcode rows across 23 countries.
Refs: #1039