fix: Date wise remote offline store historical data retrieval

[aniketpalu]

What this PR does / why we need it:

When using a remote offline store with PostgreSQL backend, calling get_historical_features() with start_date and end_date parameters fails with:

TypeError: Got an unexpected keyword argument 'start_date' / 'end_date' for RemoteOfflineStore

The implementation follows the same pattern used by local PostgreSQL based offline stores ensuring consistency across the codebase:

• Client-side changes (remote.py):

  • Add **kwargs parameter to RemoteOfflineStore.get_historical_features() method signature
  • Extract start_date and end_date from kwargs and serialize them to ISO format strings
  • Include serialized dates in api_parameters for transmission over Arrow Flight

• Server-side changes (offline_server.py):

  • Extract start_date and end_date from the command dict (if present)
  • Deserialize ISO format strings back to timezone-aware datetime objects
  • Pass extracted dates as **kwargs to the underlying offline store

Which issue(s) this PR fixes:

Misc

[ntkathole]

lgtm