[April 2, 2026] add has_pool filter to property search endpoints

v0.41.0

Add has_pool Filter to Property Search Endpoints

• Added has_pool boolean filter to v1 property search (/v1/property/search) and v2 property search endpoints, allowing users to filter properties by pool presence.
• Added has_pool field to property search and address search response schemas.
• Part of DAT-15: Add pool filter to property data downloads.