Evan Fannin 53691bad98 Keep MCP event subscriptions alive after task unloading (#41899) ...

## Why

Event subscriptions may need to outlive the MCP runtime associated with a task.

## What changed

- Add `McpEventStreamOpener`, which retains the hosted Apps MCP connection settings and opens each event stream with an independent client.
- Keep subscription cancellation tied to account changes and removal of the task's event server, including when cancellation ownership is forwarded across runtime replacement.
- Expose the opener and cancellation forwarding through `McpResourceClient`.

## Testing

Add an HTTP transport test that shuts down the runtime, refreshes credentials for the same account, and verifies that a new event stream connects with the current authorization and receives notifications.

GitOrigin-RevId: e102aa382e63121661ff0567f7523515e459922d

2026-08-31 19:18:18 +00:00

..

src

Keep MCP event subscriptions alive after task unloading (#41899)

2026-08-31 19:18:18 +00:00

BUILD.bazel

Support package-style MCP server names (#41700)

2026-08-30 16:45:34 +00:00

Cargo.toml

Support package-style MCP server names (#41700)

2026-08-30 16:45:34 +00:00