fix(router): guard OperationalError si tables météo inexistantes

backend/app/routers/meteo.py

@@ -4,6 +4,7 @@ from typing import Any, Optional
 
 from fastapi import APIRouter, Depends, HTTPException, Query
 from sqlalchemy import text
+from sqlalchemy.exc import OperationalError
 from sqlmodel import Session
 
 from app.database import get_session
@@ -13,13 +14,16 @@ router = APIRouter(tags=["météo"])
 
 def _station_daily_summary(session: Session, iso_date: str) -> Optional[dict]:
     """Agrège les mesures horaires d'une journée en résumé."""
-    rows = session.exec(
-        text(
-            "SELECT temp_ext, t_min, t_max, pluie_mm, vent_kmh, humidite "
-            "FROM meteostation WHERE substr(date_heure, 1, 10) = :d"
-        ),
-        params={"d": iso_date},
-    ).fetchall()
+    try:
+        rows = session.exec(
+            text(
+                "SELECT temp_ext, t_min, t_max, pluie_mm, vent_kmh, humidite "
+                "FROM meteostation WHERE substr(date_heure, 1, 10) = :d"
+            ),
+            params={"d": iso_date},
+        ).fetchall()
+    except OperationalError:
+        return None
 
     if not rows:
         return None
@@ -46,12 +50,15 @@ def _station_daily_summary(session: Session, iso_date: str) -> Optional[dict]:
 
 def _station_current_row(session: Session) -> Optional[dict]:
     """Dernière mesure station (max 2h d'ancienneté)."""
-    row = session.exec(
-        text(
-            "SELECT temp_ext, humidite, pression, pluie_mm, vent_kmh, vent_dir, uv, solaire, date_heure "
-            "FROM meteostation WHERE type='current' ORDER BY date_heure DESC LIMIT 1"
-        )
-    ).fetchone()
+    try:
+        row = session.exec(
+            text(
+                "SELECT temp_ext, humidite, pression, pluie_mm, vent_kmh, vent_dir, uv, solaire, date_heure "
+                "FROM meteostation WHERE type='current' ORDER BY date_heure DESC LIMIT 1"
+            )
+        ).fetchone()
+    except OperationalError:
+        return None
 
     if not row:
         return None
@@ -64,13 +71,16 @@ def _station_current_row(session: Session) -> Optional[dict]:
 
 
 def _open_meteo_day(session: Session, iso_date: str) -> Optional[dict]:
-    row = session.exec(
-        text(
-            "SELECT t_min, t_max, pluie_mm, vent_kmh, wmo, label, humidite_moy, sol_0cm, etp_mm "
-            "FROM meteoopenmeteo WHERE date = :d"
-        ),
-        params={"d": iso_date},
-    ).fetchone()
+    try:
+        row = session.exec(
+            text(
+                "SELECT t_min, t_max, pluie_mm, vent_kmh, wmo, label, humidite_moy, sol_0cm, etp_mm "
+                "FROM meteoopenmeteo WHERE date = :d"
+            ),
+            params={"d": iso_date},
+        ).fetchone()
+    except OperationalError:
+        return None
 
     if not row:
         return None