v2 foundation: shared contracts, app profile schema, wiring stubs

- projects: app profile columns + one app per org; project_external_git,
  deploy_targets, org_model_grants tables (migration a0f0e1d2c3b4)
- ports + fakes: RepoWorkspace, DeliveryHooks, DeployTarget, Memory,
  ModelGrants, WorkforceBootstrap; AppProfile + AppProfileRepository
- per-workstream wiring (container_org/engine/delivery), config blocks,
  empty routers, delivery worker, MCP/delivery service shells, web stubs
- admin nav derives from ADMIN_ITEMS; plan docs updated for ext4 worktrees

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

apps/api/app/workers/delivery.py

@@ -0,0 +1,15 @@
+"""Delivery worker — executes queued CI/CD pipeline runs and polls remotes for pushes.
+
+Owned by Agent 3 (see docs/plan/PLAN-v2.md). Foundation stub: one no-op pass.
+"""
+
+from __future__ import annotations
+
+from app.workers.base import WorkerOutcome
+
+
+class DeliveryWorker:
+    name = "delivery"
+
+    async def run_pass(self, *, limit: int = 10) -> WorkerOutcome:
+        return WorkerOutcome(name=self.name)