fix: BUG-20 clamp trips sequence after recompute + renumber migration

server/modules/db.py

@@ -509,6 +509,13 @@ def compute_trips_for_device(device_id):
                 """,
                 {"device_id": device_id, **t},
             )
+        # BIGSERIAL consumes a sequence value on every INSERT attempt, even when
+        # the ON CONFLICT (DO UPDATE) path is taken. Clamp the sequence back to the
+        # real max id so trip IDs don't inflate by trip_count on every recompute.
+        cur.execute(
+            "SELECT setval(pg_get_serial_sequence('trips','id'), "
+            "(SELECT COALESCE(MAX(id), 0) FROM trips))"
+        )
     return len(trips)