Populate eCPS-supported export inputs

[MaxGhenis]

Summary

• populate CPS-backed export-support fields for current health coverage, hourly/tipped work, occupation flags, pensions/retirement distributions, veterans/workers comp, SSN/TIN, immigration status, pregnancy, and prior-year income fields from actual prior-year ASEC joins
• add PUF-backed QBI/199A, mortgage-interest, investment-interest, and health-premium support, with joint-filer conservation for new QBI fields
• expose SIPP vehicle count/value donor fields and carry vehicle exports onto household tables

Tests

• uv run --python 3.13 --extra dev ruff check src/microplex_us/data_sources/cps.py src/microplex_us/data_sources/puf.py src/microplex_us/pipelines/us.py src/microplex_us/variables.py tests/data_sources/test_cps_export_support_fields.py tests/test_cps_source_provider.py tests/pipelines/test_us.py tests/test_donor_survey_source_providers.py tests/test_pe_source_impute_specs.py tests/test_puf_source_provider.py && uv run --python 3.13 --extra dev ruff format --check src/microplex_us/data_sources/cps.py src/microplex_us/data_sources/puf.py src/microplex_us/pipelines/us.py src/microplex_us/variables.py tests/data_sources/test_cps_export_support_fields.py tests/test_cps_source_provider.py tests/pipelines/test_us.py tests/test_donor_survey_source_providers.py tests/test_pe_source_impute_specs.py tests/test_puf_source_provider.py
• uv run --python 3.13 --extra dev python -m pytest tests/data_sources/test_cps_export_support_fields.py tests/test_cps_source_provider.py::test_load_cps_asec_attaches_previous_year_income_from_prior_asec tests/test_cps_source_provider.py::test_load_cps_asec_caches_household_geography_on_persons tests/test_cps_source_provider.py::test_load_cps_asec_derives_policyengine_value_inputs tests/test_puf_source_provider.py tests/test_pe_source_impute_specs.py tests/test_donor_survey_source_providers.py tests/pipelines/test_us.py::TestUSMicroplexPipeline::test_augment_policyengine_person_inputs_materializes_export_support_aliases tests/pipelines/test_us.py::TestUSMicroplexPipeline::test_attach_policyengine_tax_unit_source_inputs_derives_mortgage_structure tests/pipelines/test_us.py::TestUSMicroplexPipeline::test_build_policyengine_households_preserves_vehicle_exports tests/pipelines/test_us.py::TestUSMicroplexPipeline::test_build_policyengine_entity_tables_adds_ecps_stochastic_takeup_inputs tests/pipelines/test_us.py::TestUSMicroplexPipeline::test_attach_policyengine_pregnancy_inputs_assigns_eligible_females tests/pipelines/test_us.py::TestUSMicroplexPipeline::test_attach_policyengine_pregnancy_inputs_preserves_explicit_column tests/pipelines/test_us.py::TestUSMicroplexPipeline::test_build_policyengine_entity_tables_adds_wic_takeup_inputs tests/pipelines/test_us.py::TestUSMicroplexPipeline::test_build_policyengine_entity_tables_preserves_explicit_stochastic_takeup_inputs tests/pipelines/test_check_export_columns.py tests/pipelines/test_mp300k_artifact_gates.py
• uv run --python 3.13 --extra dev python -m json.tool src/microplex_us/manifests/pe_source_impute_blocks.json >/tmp/pe_source_impute_blocks.json.validated

Notes

This is source-backed support population, not calibration/L0 and not manual filler values. The prior-year fields use the eCPS-style PERIDNUM join to the previous CPS ASEC when that raw zip is available; otherwise they fall back to explicit unavailable values so support parity still fails rather than pretending coverage.