SSE event types

Events streamed over GET /api/runs/{id}/events:

• agent_completed
• agent_delta
• agent_reasoning
• agent_turn_started
• awaiting_user_input
• error
• evidence_recorded
• final_result
• history_compressed
• hypothesis_update
• investigation_snapshot
• moderator_decision
• reasoning_effort_ignored
• run_cancelled
• run_finished
• run_resumed
• run_started
• test_plan
• tool_approval_request
• tool_approval_resolved
• tool_call
• tool_call_started
• user_comment
• verifier_decision