[FIX] endpoint_route_handler: precompute=True on route field

Without precompute, the required computed field is evaluated after
INSERT (during flush), so creating an endpoint whose route is derived
from other fields by a downstream module fails with "Missing required
value for the field 'Route'" — the INSERT runs before the compute can
populate the column.

Author: AungKoKoLin1997

endpoint_route_handler/models/endpoint_route_handler.py

@@ -22,6 +22,7 @@ class EndpointRouteHandler(models.AbstractModel):
         index=True,
         compute="_compute_route",
         inverse="_inverse_route",
+        precompute=True,
         readonly=False,
         store=True,
         copy=False,