feat: add dex_report_date to AssetCreate model + test for no_dex_days filter

- Add dex_report_date field to AssetCreate Pydantic model
- Include dex_report_date in _build_asset_insert columns/values
- Add test_list_assets_filter_no_dex_days test (11/11 pass)

server.py

@@ -651,6 +651,7 @@ class AssetCreate(BaseModel):
     is_disney: Optional[bool] = None
     keys: Optional[List[AssetKey]] = []
     badges: Optional[List[str]] = []
+    dex_report_date: Optional[str] = None
 
 
 class AssetUpdate(BaseModel):
@@ -889,6 +890,7 @@ def _build_asset_insert(body: AssetCreate, machine_id: str, name: str):
         "room", "trailer_number", "walking_directions", "map_link",
         "parking_location", "photo_path", "customer_id", "location_id",
         "assigned_to", "latitude", "longitude", "geofence_radius_meters", "is_disney",
+        "dex_report_date",
     ]
     values = (
         machine_id, body.serial_number or "", name, body.description or "",
@@ -902,6 +904,7 @@ def _build_asset_insert(body: AssetCreate, machine_id: str, name: str):
         body.latitude, body.longitude,
         body.geofence_radius_meters if body.geofence_radius_meters is not None else 50,
         body.is_disney if body.is_disney is not None else None,
+        body.dex_report_date,
     )
     return columns, values