v0.5.3

• Fix: stop button from Android not working for web-started goals
• Fix: make drizzle migrations idempotent for pushed schema changes
  fix message
• Fix: send goal_scheduled instead of goal_completed when scheduling
• support QSTASH_URL for local dev and custom endpoints
• Fix: fix retry status cycling and QStash fallthrough path
• add scheduled goal UI with clock icon, tooltip, and cancel
• add cancelScheduledGoal API command
• add QStash callback and cancel endpoints
• schedule goals via QStash in pipeline
• extend classifier to detect scheduled goals
• add QStash client module
• add scheduled goal columns to agentSession schema