Issue #3562458: Add support for raw filter strings in TypesenseSelectedFacet

Add optional filter field to TypesenseSelectedFacet input type to support complex filter scenarios that cannot be handled by the standard field:[values] construction. This enables date range overlap filtering and other advanced use cases.

When the filter property is provided, it bypasses the standard filter construction and uses the raw Typesense filter string directly.

Closes #3562458