Add poll-backed scheduling backend

src/govoplan_scheduling/backend/manifest.py

@@ -1,14 +1,21 @@
 from __future__ import annotations
 
+from pathlib import Path
+
 from govoplan_core.core.access import CAPABILITY_AUTH_PERMISSION_EVALUATOR, CAPABILITY_AUTH_PRINCIPAL_RESOLVER
+from govoplan_core.core.module_guards import drop_table_retirement_provider, persistent_table_uninstall_guard
 from govoplan_core.core.modules import (
     DocumentationTopic,
+    MigrationSpec,
+    ModuleContext,
     ModuleInterfaceProvider,
     ModuleInterfaceRequirement,
     ModuleManifest,
     PermissionDefinition,
     RoleTemplate,
 )
+from govoplan_core.db.base import Base
+from govoplan_scheduling.backend.db import models as scheduling_models  # noqa: F401 - populate Scheduling ORM metadata
 
 MODULE_ID = "scheduling"
 MODULE_NAME = "Scheduling"
@@ -77,6 +84,35 @@ DOCUMENTATION = (
     ),
 )
 
+
+def _tenant_summary(session, tenant_id: str) -> dict[str, int]:
+    from govoplan_scheduling.backend.db.models import SchedulingCandidateSlot, SchedulingParticipant, SchedulingRequest
+
+    return {
+        "scheduling_requests": (
+            session.query(SchedulingRequest)
+            .filter(SchedulingRequest.tenant_id == tenant_id, SchedulingRequest.deleted_at.is_(None))
+            .count()
+        ),
+        "scheduling_candidate_slots": (
+            session.query(SchedulingCandidateSlot)
+            .filter(SchedulingCandidateSlot.tenant_id == tenant_id, SchedulingCandidateSlot.deleted_at.is_(None))
+            .count()
+        ),
+        "scheduling_participants": (
+            session.query(SchedulingParticipant)
+            .filter(SchedulingParticipant.tenant_id == tenant_id, SchedulingParticipant.deleted_at.is_(None))
+            .count()
+        ),
+    }
+
+
+def _scheduling_router(_context: ModuleContext):
+    from govoplan_scheduling.backend.router import router
+
+    return router
+
+
 manifest = ModuleManifest(
     id=MODULE_ID,
     name=MODULE_NAME,
@@ -96,6 +132,29 @@ manifest = ModuleManifest(
     ),
     permissions=PERMISSIONS,
     role_templates=ROLE_TEMPLATES,
+    route_factory=_scheduling_router,
+    tenant_summary_providers=(_tenant_summary,),
+    migration_spec=MigrationSpec(
+        module_id=MODULE_ID,
+        metadata=Base.metadata,
+        script_location=str(Path(__file__).with_name("migrations") / "versions"),
+        retirement_supported=True,
+        retirement_provider=drop_table_retirement_provider(
+            scheduling_models.SchedulingRequest,
+            scheduling_models.SchedulingCandidateSlot,
+            scheduling_models.SchedulingParticipant,
+            label="Scheduling",
+        ),
+        retirement_notes="Destructive retirement drops scheduling-owned database tables after the installer captures a database snapshot.",
+    ),
+    uninstall_guard_providers=(
+        persistent_table_uninstall_guard(
+            scheduling_models.SchedulingRequest,
+            scheduling_models.SchedulingCandidateSlot,
+            scheduling_models.SchedulingParticipant,
+            label="Scheduling",
+        ),
+    ),
     documentation=DOCUMENTATION,
 )