Port housing market accounting fixes

[agurgone]

Summary

• Ports the remaining housing-market accounting fixes from Fix housing market accounting combined main macro-main#93.
• Applies the first reviewer recommendations by naming the private-renter and vacancy sentinels, keeping sale filtering index-based until final assignment, and adding focused regression coverage.
• Fixes the rent-value regression orientation so runtime observed rent coefficients are estimated as rent on property value, matching new-rental offer pricing.

Details

• Private renters now participate in housing demand via tenure status 3 instead of status 0.
• Moving-owner sale listings now use household IDs, only list vacant or owner-occupied homes, and include -1/NaN vacancies in rental listings.
• Sold properties are removed from the rental pool before rental matching.
• Empty automatic matching returns an empty transaction frame instead of failing.
• Housing clearing now drops infeasible financed/occupied sales before processing and avoids clearing a previous residence that has already received a new occupant.
• Observed housing ratios are recorded after housing-market clearing, and object-typed transaction values are coerced before histogram/regression calculations.

Verification

• /Users/andone/Documents/python_projects/INET-consumption/.venv/bin/ruff check macromodel/agents/households/func/property.py macromodel/agents/households/households.py macromodel/markets/housing_market/housing_market.py macromodel/markets/housing_market/func/clearing.py macromodel/country/country.py tests/test_macromodel/unit/test_agents/test_households/func/test_property_probability.py tests/test_macromodel/unit/test_agents/test_households/func/test_property_performance.py tests/test_macromodel/unit/test_country/test_country.py tests/test_macromodel/unit/test_markets/test_housing_market/test_housing_market.py
• /Users/andone/Documents/python_projects/INET-consumption/.venv/bin/python -m pytest tests/test_macromodel/unit/test_agents/test_households/func/test_property_probability.py tests/test_macromodel/unit/test_agents/test_households/func/test_property_performance.py tests/test_macromodel/unit/test_agents/test_households/test_households.py tests/test_macromodel/unit/test_country/test_country.py tests/test_macromodel/unit/test_markets/test_housing_market/test_housing_market.py
• /Users/andone/Documents/python_projects/INET-consumption/.venv/bin/python -m pytest tests/test_macrocalib/unit/test_sampler.py