Add CPS block geography exports#129
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…attach Carry-overs from reconciling PR #129 against the closed PR #130: - _congressional_district_geoid_from_cd_id: also accept the raw Census at-large forms (AL/ZZ tokens and district 0/98) and normalize them to district 01, matching eCPS's policyengine-us-data db/create_initial_strata.py. Verified the encoder reproduces the eCPS 436-CD calibration universe exactly on the real block crosswalk (AK=201, WY=5601, DC=1101). - _attach_household_census_geographies: collapse to a fresh RangeIndex up front. The block write-back via .loc[row_index] previously raised "ValueError: cannot reindex on an axis with duplicate labels" on a non-unique household-frame index. The caller consumes the result via merge on the household_id column, not the index, so this is safe. - Add tests/pipelines/test_geoid_cd_encoding.py: encoder contract (multi-district SSDD, at-large=01, raw-form hardening, invalid inputs), the duplicate-index regression, and a live 436-CD universe parity check (skips without the crosswalk parquet, e.g. in CI). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Summary
Coordination
Tests