feat(calendar): schedule durable outbox recovery

src/govoplan_core/celery_app.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 from celery import Celery
 
 from govoplan_core.core.campaigns import CAPABILITY_CAMPAIGNS_DELIVERY_TASKS, CampaignDeliveryTaskProvider
+from govoplan_core.core.calendar import CAPABILITY_CALENDAR_OUTBOX, CalendarOutboxProvider
 from govoplan_core.core.module_management import load_startup_enabled_modules, startup_candidate_module_ids
 from govoplan_core.core.modules import ModuleContext
 from govoplan_core.core.notifications import CAPABILITY_NOTIFICATIONS_DISPATCH, NotificationDispatchProvider
@@ -27,10 +28,18 @@ celery.conf.update(
         "govoplan.campaigns.append_sent": {"queue": "append_sent"},
         "govoplan.notifications.deliver": {"queue": "notifications"},
         "govoplan.notifications.deliver_pending": {"queue": "notifications"},
+        "govoplan.calendar.dispatch_outbox": {"queue": "calendar"},
     },
     worker_prefetch_multiplier=1,
     task_acks_late=True,
     task_reject_on_worker_lost=True,
+    beat_schedule={
+        "calendar-outbox-every-minute": {
+            "task": "govoplan.calendar.dispatch_outbox",
+            "schedule": 60.0,
+            "args": (None, 100),
+        },
+    },
 )
 
 
@@ -67,6 +76,16 @@ def _notification_dispatch() -> NotificationDispatchProvider:
     return capability
 
 
+def _calendar_outbox() -> CalendarOutboxProvider | None:
+    registry = _platform_registry()
+    if not registry.has_capability(CAPABILITY_CALENDAR_OUTBOX):
+        return None
+    capability = registry.require_capability(CAPABILITY_CALENDAR_OUTBOX)
+    if not isinstance(capability, CalendarOutboxProvider):
+        raise RuntimeError("Calendar outbox capability is invalid")
+    return capability
+
+
 @celery.task(name="govoplan.campaigns.send_email", bind=True, max_retries=0)
 def send_email(self, job_id: str):
     """Send one explicitly queued campaign job.
@@ -111,3 +130,18 @@ def deliver_pending_notifications(self, tenant_id: str | None = None, limit: int
 
     with get_database().SessionLocal() as session:
         return dict(_notification_dispatch().deliver_pending(session, tenant_id=tenant_id, limit=limit))
+
+
+@celery.task(name="govoplan.calendar.dispatch_outbox", bind=True, max_retries=0)
+def dispatch_calendar_outbox(self, tenant_id: str | None = None, limit: int = 50):
+    """Drain durable Calendar operations; retry timing lives in the database."""
+
+    from govoplan_core.db.session import get_database
+
+    with get_database().SessionLocal() as session:
+        provider = _calendar_outbox()
+        if provider is None:
+            return {"processed": 0, "succeeded": 0, "retrying": 0, "failed": 0, "operations": []}
+        result = dict(provider.dispatch_due(session, tenant_id=tenant_id, limit=limit))
+        session.commit()
+        return result