docs: add parity checkpoints for scheduler and vulnerabilities sprints

docs/implplan/SPRINT_3402_0001_0001_postgres_scheduler.md

@@ -90,6 +90,8 @@
 - Validate job throughput matches MongoDB performance.
 - Coordinate with Orchestrator for any job handoff patterns.
 - Provide Mongo snapshot + credentials (or sign off on “start clean” data reset) and rerun backfill/verification to close PG-T2.9–T2.11.
+- 2025-12-12 · Snapshot/approval decision (Action #1) — owners: DevOps Guild, Scheduler Guild.
+- 2025-12-14 · Parity run & verification report (Action #2) — owner: Scheduler Guild; publish report under `docs/db/reports/scheduler-parity-20251214.md`.
 
 ---
 *Reference: docs/db/tasks/PHASE_2_SCHEDULER.md*

docs/implplan/SPRINT_3405_0001_0001_postgres_vulnerabilities.md

@@ -89,8 +89,9 @@
 ## Upcoming Checkpoints
 | Date (UTC) | Checkpoint | Owner | Notes |
 | --- | --- | --- | --- |
-| TBD | Schedule parity verification window after PG-T5b.4.3 completes | Concelier Guild | Add date once 5a integration tests are green |
-| TBD | Phase 6 (Excititor) kickoff after PostgreSQL-only cutover readiness | Excititor Guild | Dependent on PG-T5b.6 sign-off |
+| 2025-12-09 | Enable dual-import + schedule SBOM sample set | Concelier Guild | Turn on PG-T5b.3.1 dual-import; pick 10k advisory sample + SBOM set for parity run. |
+| 2025-12-11 | Parity run (Mongo vs Postgres) + findings report | Concelier Guild | Execute PG-T5b.3.2/PG-T5b.4.1–4.4; capture counts/hashes/findings deltas and store report under `docs/db/reports/vuln-parity-20251211.md`. |
+| 2025-12-15 | Cutover readiness review | Concelier Guild · Excititor Guild | If parity clean, schedule PG-T5b.5 perf tuning and PG-T5b.6 cutover window; unblock Sprint 3406 Wave 6a. |
 
 ## Action Tracker
 | # | Action | Owner | Due | Status | Notes |