Keep LanceDB integrations current with 0.26.0 support

Agno now aligns with LanceDB’s latest API, replacing the deprecated table_names() with list_tables() and updating the minimum LanceDB version to 0.26.0. This avoids deprecation-related breakages and keeps integrations stable.

Details:

• Action required: upgrade LanceDB to version 0.26.0 or later
• If you call LanceDB directly, update usage to list_tables(); Agno’s adapter handles this internally

Who this is for: Teams using LanceDB as a vector store and relying on stable, forward-compatible storage integrations.