CedarCopilot/cedar-mail

Branch: staging

Parse the board tool result instead of asserting it

merged#2899CedarCopilot

CedarCopilot wants to merge 1 commit into staging from fix/board-result-parse-not-cast

A tool call an agent makes for a user finishes with a result
Libra ran this behavior against the change and confirmed the check detects when it breaks.
Technical evidence
- the agent's board creation call finishes with its created-board result instead of stopping when the run identifier is not a string
String run IDs remain attached to created board documents
Libra ran this behavior against the change and confirmed the check detects when it breaks.
Technical evidence
- a board created with a string runId is attached to the thread with that exact runId
- a board created with a non-string runId is attached without a runId
Changed code: boardTool.ts.