[Bug] Canceling team runs via API not working - 500

[bogdanrau]

Description

When attempting to cancel an active run (via the /teams/<team_id>/runs/<run_id>/cancel endpoint), the run fails to cancel and continues running in the background.

Steps to Reproduce

1. Create a new team run and obtain a run_id.
2. While that run is running, attempt to cancel via /teams/<team_id>/runs/<run_id>.
3. Observe in the console the following error (redacting sensitive info):

WARNING  Attempted to cancel unknown run 522f2e7f-46e3-49ba-9073-180274991c36   
INFO   <IP ADDRESS> - "POST /teams/team_name/runs/522f2e7f-46e3-49ba-9073-180274991c36/cancel HTTP/1.1" 500

Agent Configuration (if applicable)

Vanilla teams endpoint.

Expected Behavior

The run should stop executing.

Actual Behavior

The run continues to execute. After a while, getting the session info or runs via either /sessions/<session_id> or /sessions/<session_id>/runs reveals that the team continued the run until resolution in the background.

Screenshots or Logs (if applicable)

No response

Environment

- OS: Linux

Possible Solutions (optional)

No response

Additional Context

No response