Add initial polling backend logic

src/govoplan_poll/backend/manifest.py

@@ -1,13 +1,20 @@
 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,
     ModuleManifest,
     PermissionDefinition,
     RoleTemplate,
 )
+from govoplan_core.db.base import Base
+from govoplan_poll.backend.db import models as poll_models  # noqa: F401 - populate Poll ORM metadata
 
 MODULE_ID = "poll"
 MODULE_NAME = "Poll"
@@ -75,6 +82,22 @@ DOCUMENTATION = (
     ),
 )
 
+
+def _tenant_summary(session, tenant_id: str) -> dict[str, int]:
+    from govoplan_poll.backend.db.models import Poll, PollResponse
+
+    return {
+        "polls": session.query(Poll).filter(Poll.tenant_id == tenant_id, Poll.deleted_at.is_(None)).count(),
+        "poll_responses": session.query(PollResponse).filter(PollResponse.tenant_id == tenant_id, PollResponse.deleted_at.is_(None)).count(),
+    }
+
+
+def _poll_router(_context: ModuleContext):
+    from govoplan_poll.backend.router import router
+
+    return router
+
+
 manifest = ModuleManifest(
     id=MODULE_ID,
     name=MODULE_NAME,
@@ -89,6 +112,29 @@ manifest = ModuleManifest(
     ),
     permissions=PERMISSIONS,
     role_templates=ROLE_TEMPLATES,
+    route_factory=_poll_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(
+            poll_models.Poll,
+            poll_models.PollOption,
+            poll_models.PollResponse,
+            label="Poll",
+        ),
+        retirement_notes="Destructive retirement drops poll-owned database tables after the installer captures a database snapshot.",
+    ),
+    uninstall_guard_providers=(
+        persistent_table_uninstall_guard(
+            poll_models.Poll,
+            poll_models.PollOption,
+            poll_models.PollResponse,
+            label="Poll",
+        ),
+    ),
     documentation=DOCUMENTATION,
 )