fix: Fix Spanner DatabaseSessionService support #2518
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Introduce `DynamicPickleType` to handle session actions, using sqlalchemy-spanner `SpannerPickleType` when the database dialect is Spanner. Connects to a Spanner database to store session data persistently in tables. # Example using Spanner database: `session_service = DatabaseSessionService(db_url="spanner+spanner:///projects/project-id/instances/instance-id/databases/database-id")` # Example adk web command: `adk web --session_service_uri="spanner+spanner:///projects/project-id/instances/instance-id/databases/database-id"` PiperOrigin-RevId: 797416610
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fix: Fix Spanner DatabaseSessionService support
Introduce
DynamicPickleTypeto handle session actions, using sqlalchemy-spannerSpannerPickleTypewhen the database dialect is Spanner.Connects to a Spanner database to store session data persistently in tables.
Example using Spanner database:
session_service = DatabaseSessionService(db_url="spanner+spanner:///projects/project-id/instances/instance-id/databases/database-id")Example adk web command:
adk web --session_service_uri="spanner+spanner:///projects/project-id/instances/instance-id/databases/database-id"