Built on #1184, Junior can now persist event tasks that execute a durable instruction whenever an enabled plugin publishes a matching resource event. Tasks are scoped to the current Slack channel or DM, can select multiple event types, and allow multiple tasks for the same resource selector. The management tools follow scheduler-style destination permissions and intentionally omit pause and resume operations.

Tasks use the creator's connected credentials by default when the stored work needs user-bound access. Other members of a public destination can manage the task, but they cannot enable or retarget the creator's delegated credentials. Matching events dispatch through the existing durable agent-delivery path, using the task and provider event key for idempotency so webhook replays do not execute a task twice.

The SQL migration, task store, authorization, tools, dispatch path, and event-task evals are contained here. Temporary resource watches, plugin event registration, runtime discovery, and GitHub/Vercel event normalization are reviewed separately in #1184. A code TODO records the remaining circuit-breaker work for runaway event-driven execution rather than imposing an arbitrary execution quota in this change.

Refs #1174