M8-R06: refresh Tibber prices after startup and configuration

app/main.py

@@ -1,6 +1,7 @@
 import logging
 import os
 from contextlib import asynccontextmanager
+from datetime import UTC, datetime
 from pathlib import Path
 from typing import Callable
 
@@ -38,7 +39,7 @@ from app.services.dsmr_ingest import apply_dsmr_subscription
 from app.services.public_ip import check_public_ipv4_and_notify
 from app.services.modbus_poll import poll_all_enabled_devices, BASE_POLL_TICK_SECONDS
 from app.services.ha_discovery import publish_discovery, publish_states
-from app.services.tibber_prices import refresh_prices
+from app.services.tibber_prices import run_tibber_refresh_best_effort
 from app.services.energy_cost import compute_closed_periods
 from app.services.meter_cost import compute_closed_periods as compute_closed_meter_cost_periods
 from app.services.warmtelink_worker import warmtelink_worker_manager
@@ -91,15 +92,7 @@ def _run_scheduled_tibber_refresh() -> None:
     so that a single failed fetch does not crash the scheduler or affect the
     other background jobs.
     """
-    session_local = get_session_local()
-    session: Session = session_local()
-    try:
-        runtime_settings = build_runtime_settings(session, get_settings())
-        refresh_prices(session, runtime_settings)
-    except Exception:
-        logger.exception("_run_scheduled_tibber_refresh: unexpected error")
-    finally:
-        session.close()
+    run_tibber_refresh_best_effort()
 
 
 def _run_scheduled_energy_cost() -> None:
@@ -264,6 +257,10 @@ async def lifespan(_: FastAPI):
         replace_existing=True,
         max_instances=1,
         coalesce=True,
+        # APScheduler otherwise waits one full interval before its first run.
+        # This preserves the hourly cadence while requesting a non-blocking
+        # startup fetch as soon as the scheduler starts.
+        next_run_time=datetime.now(UTC),
     )
     # Energy cost billing: compute uncalculated closed 15-minute periods every minute.
     # The job is a no-op when no active contract or DSMR data is present, so it is