docs: initialize go-live MVP mission with coordinator protocol (#455)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

.mosaic/orchestrator/mission.json

@@ -0,0 +1,51 @@
+{
+  "schema_version": 1,
+  "mission_id": "mosaic-stack-go-live-mvp-20260222",
+  "name": "Mosaic Stack Go-Live MVP",
+  "description": "Ship Mosaic Stack MVP: operational dashboard with theming, task ingestion, one visible agent cycle, deployed and smoke-tested. Unblocks SagePHR, DYOR, Calibr, and downstream projects.",
+  "project_path": "/home/jwoltje/src/mosaic-stack",
+  "created_at": "2026-02-22T23:35:51Z",
+  "status": "active",
+  "task_prefix": "MS",
+  "quality_gates": "pnpm lint && pnpm typecheck && pnpm test",
+  "milestone_version": "0.0.16",
+  "milestones": [
+    {
+      "id": "phase-1",
+      "name": "Dashboard Polish + Theming",
+      "status": "pending",
+      "branch": "dashboard-polish-theming",
+      "issue_ref": "",
+      "started_at": "",
+      "completed_at": ""
+    },
+    {
+      "id": "phase-2",
+      "name": "Task Ingestion Pipeline",
+      "status": "pending",
+      "branch": "task-ingestion-pipeline",
+      "issue_ref": "",
+      "started_at": "",
+      "completed_at": ""
+    },
+    {
+      "id": "phase-3",
+      "name": "Agent Cycle Visibility",
+      "status": "pending",
+      "branch": "agent-cycle-visibility",
+      "issue_ref": "",
+      "started_at": "",
+      "completed_at": ""
+    },
+    {
+      "id": "phase-4",
+      "name": "Deploy + Smoke Test",
+      "status": "pending",
+      "branch": "deploy-smoke-test",
+      "issue_ref": "",
+      "started_at": "",
+      "completed_at": ""
+    }
+  ],
+  "sessions": []
+}