feat(integration): wire v2 workstreams together (engine policy/budget, sandbox, tenant checks, order route, docs)

Engine honours org policy and monthly budget, legacy runner skips engine tasks,
sandbox session provisioned on demand, project fallback for threads, reviewer
fallback, tenant checks on project ids, memory reflection respects grants,
expiry worker, MCP pipeline_status, login redirect, sharing settings, e2e smoke.

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

apps/api/app/application/container.py

@@ -22,8 +22,13 @@ from app.application.container_delivery import (
     build_deploy_target_tester,
     build_repo_workspace,
 )
-from app.application.container_engine import build_workforce_bootstrap
-from app.application.container_org import build_memory, build_model_grants
+from app.application.container_engine import build_scheduler, build_workforce_bootstrap
+from app.application.container_org import (
+    build_memory,
+    build_memory_service,
+    build_model_grant_service,
+    build_model_grants,
+)
 from app.application.services.billing_service import BillingService
 from app.application.services.knowledge_service import KnowledgeService
 from app.application.services.project_service import ProjectService
@@ -172,8 +177,11 @@ __all__ = [
     "build_deploy_service",
     "build_deploy_target_tester",
     "build_memory",
+    "build_memory_service",
+    "build_model_grant_service",
     "build_model_grants",
     "build_repo_workspace",
+    "build_scheduler",
     "build_workforce_bootstrap",
     "build_knowledge_service",
     "build_project_service",