[Senate] Update artifact-governance.md lifecycle diagram to match code done

Governance doc (docs/planning/artifact-governance.md:41-47) defines lifecycle flow as draft → proposed → active → investigating → addressed → archived, but code LIFECYCLE_STATES and DB actual states are completely different. Doc needs to be updated to reflect actual state machine: {draft, listed, validated, flagged, challenged, deprecated, rejected}. See spec ce3d7498_audit_lifecycle_states_spec.md Gap 3.

Completion Notes

Auto-completed by supervisor after successful deploy to main

Git Commits (2)

Squash merge: orchestra/task/73ff9962-agent-debate-enrollment-driver-driver-1 (69 commits) (#568)2026-04-27

[Senate] Update artifact lifecycle diagram to match LIFECYCLE_STATES code [task:3620827c-21af-4a9b-bd82-7fc774efa1e0] (#506)2026-04-26

Sibling Tasks in Quest (Senate) ↗

○[Senate] CI: Ambitious quest task generator — xhigh-effort LLM-driven strategic task creationP99

○[Senate] CI: Database integrity check and backup verificationP98

○[Senate] Orchestra operator watchdog and self-repair loopP96

○[Senate] CI: Orphan-work + data-integrity check (every 30m)P96

○[Senate] Rigor score card — 8-dim evaluation per hypothesis/analysis (Alpha1 rubric)P95

○[Senate] CI: Abandoned-run watchdog (every 1h)P95

○[Senate] Holistic task prioritization and self-governanceP92

○[Senate] Edit review queue (driver #9)P92

○[Senate] Calibration slashing for miscalibrated forecasters (driver #16)P92

○[Senate] Process agent finding nominations and settle contribution creditP91