felixxia-oai e41e882174 Add storage namespaces for local message boards (#55971) ...

## Why

Local message boards use a fixed database filename. Callers need separate storage for boards that share a session identity.

## What changed

- Add `LocalBoardOptions` with a validated `storage_namespace`, and support it when opening, configuring, and permanently deleting boards.
- Allow `LocalBoard::with_options` to select storage for its connections.
- Store custom namespaces in `message_board_<namespace>_1.sqlite`, while preserving `agent_message_board_1.sqlite` for the default namespace.
- Have the agent message board extension select the same namespace for opening, setup, and deletion.

## Testing

Add coverage for namespace isolation, reopening saved posts, and avoiding collisions with other runtime databases. Update setup tests to exercise a custom namespace through reopening and deletion.

GitOrigin-RevId: a6ea8d171809625edeedc3a8ac3ee2e1bbf1682a

2026-10-21 19:36:20 +00:00

..

configure_board.rs

Add storage namespaces for local message boards (#55971)

2026-10-21 19:36:20 +00:00