docs(federation): fix MISSION-MANIFEST layout and mark M2 in-progress

- Restore Parent Mission line to mission frontmatter (was split by Test Infrastructure block)
- M2 milestone row: not-started -> in-progress, started 2026-04-21
- Next Step section: replace "begin when greenlit" with active execution plan covering CODE + DEPLOY parallel workstreams

Refs #461 #482

docs/federation/MISSION-MANIFEST.md

@@ -12,6 +12,7 @@
 **Progress:** 1 / 7 milestones
 **Status:** active
 **Last Updated:** 2026-04-21 (M2 decomposed; mos-test-1/-2 designated as federation E2E test hosts)
+**Parent Mission:** None — new mission
 
 ## Test Infrastructure
 
@@ -21,7 +22,6 @@
 | `mos-test-2.woltje.com` | Federation Server B (serving side)  | `gateway:fed-v0.1.0-m1` (M1 baseline) | federated |
 
 These are TEST hosts for federation E2E (M3+). Distinct from PRD AC-12 production targets (`woltje.com` ↔ `uscllc.com`). Deployment workstream tracked in `docs/federation/TASKS.md` under FED-M2-DEPLOY-\*.
-**Parent Mission:** None — new mission
 
 ## Context
 
@@ -63,7 +63,7 @@ Key design references:
 | #   | ID     | Name                                          | Status      | Branch             | Issue | Started    | Completed  |
 | --- | ------ | --------------------------------------------- | ----------- | ------------------ | ----- | ---------- | ---------- |
 | 1   | FED-M1 | Federated tier infrastructure                 | done        | (12 PRs #470-#481) | #460  | 2026-04-19 | 2026-04-19 |
-| 2   | FED-M2 | Step-CA + grant schema + admin CLI            | not-started | —                  | #461  | —          | —          |
+| 2   | FED-M2 | Step-CA + grant schema + admin CLI            | in-progress | (decomposition)    | #461  | 2026-04-21 | —          |
 | 3   | FED-M3 | mTLS handshake + list/get + scope enforcement | not-started | —                  | #462  | —          | —          |
 | 4   | FED-M4 | search verb + audit log + rate limit          | not-started | —                  | #463  | —          | —          |
 | 5   | FED-M5 | Cache + offline degradation + OTEL            | not-started | —                  | #464  | —          | —          |
@@ -92,6 +92,10 @@ Key design references:
 
 ## Next Step
 
-FED-M1 complete (12 PRs #470-#481, tag `fed-v0.1.0-m1`). Federated tier infrastructure is testable end-to-end: see `docs/federation/SETUP.md` and `docs/guides/migrate-tier.md`.
+FED-M2 active. Decomposition landed in `docs/federation/TASKS.md` (M2-01..M2-13 code workstream + DEPLOY-01..DEPLOY-05 parallel test-deploy workstream, ~88K total). Tracking issue #482.
 
-Begin FED-M2 (Step-CA + grant schema + admin CLI) when planning is greenlit. Issue #461 tracks scope; orchestrator decomposes M2 into per-task rows in `docs/federation/TASKS.md` at the start of M2.
+Parallel execution plan:
+
+- **CODE workstream**: M2-01 (DB migration) starts immediately — sonnet subagent on `feat/federation-m2-schema`. Then M2-02 → M2-09 sequentially with M2-04/M2-05/M2-06/M2-07 having interleaved CA/storage/grant dependencies.
+- **DEPLOY workstream**: DEPLOY-01 (image verify) → DEPLOY-02 (stack template) → DEPLOY-03/04 (mos-test-1/-2 deploy) → DEPLOY-05 (TEST-INFRA.md). Gated on Portainer wrapper PR (`PORTAINER_INSECURE` flag) merging first.
+- **Re-converge** at M2-10 (E2E test) once both workstreams ready.