problem

cc-quick roster treated every row with ended_at_ms IS NULL as live. Dirty exits left 1,607 historical rows open on ap-pro, so the Codex bash path reported years of stale tasks as active even though the MCP path already had a five-minute freshness contract.

change

• apply the same configurable five-minute freshness window to roster, target resolution, and digest joins
• mark stale rows ended at their last observed timestamp without deleting history
• reject malformed freshness configuration
• add fixture-backed regression coverage

verification

• bash -n plugins/cc/bin/cc-quick
• bun test tests/: 45 pass
• bunx tsc --noEmit