Keep background task metadata aligned with the background_output contract so callers do not pass a session id where the task manager expects a background task id.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Implements question-denied session permission rules when creating child
sessions via background task delegation. This prevents subagents from
asking questions by passing explicit permission configuration during
session creation.
🤖 GENERATED WITH ASSISTANCE OF OhMyOpenCode
WAIT_FOR_SESSION_TIMEOUT_MS of 2ms was too tight for 2 poll iterations
at 1ms intervals — setTimeout precision caused the budget to expire
before the 2nd getTask call. Bumped to 50ms.
YeonGyu-Kim