The duplicate-CEO-row fix landed on one call site but three identical
bare 'select(...).where(role == ...)' + scalar_one_or_none() lookups
remained in the orchestrator (auditor + two CEO), each still raising
MultipleResultsFound under the same condition. All five sites now route
through a shared get_agent_by_role helper (earliest-created row wins).
The five event-bus notification handlers also thread task_title so a
revived producer renders titles instead of #id8 (protocol signatures
updated to match the service), the pull_request CI trigger mirrors the
push trigger's paths so a fork PR touching only those paths still runs
CI, and a stale a2a comment about auditor/pr_reviewer lacking read_a2a
is corrected.