Update config:

- add by_alias attr
Update contract:
- del aliase for Vlans vlan_id
Update qtech.ttp:
- fix vla_id _start_ method

oxi/interfaces/contract.py

@@ -32,7 +32,7 @@ class Vlans(Base):
     Optional
     """
 
-    vlan_id: int = Field(alias="id")
+    vlan_id: int
     name: str | None = Field(default=None, alias="description")