feat: rename masq to snat throughout, update generator to Shorewall 5 snat format

backend/app/schemas.py

@@ -160,22 +160,22 @@ class RuleOut(BaseModel):
     model_config = {"from_attributes": True}
 
 
-# --- Masq ---
-class MasqCreate(BaseModel):
+# --- Snat ---
+class SnatCreate(BaseModel):
     source_network: str
     out_interface: str
     to_address: str = ""
     comment: str = ""
 
 
-class MasqUpdate(BaseModel):
+class SnatUpdate(BaseModel):
     source_network: Optional[str] = None
     out_interface: Optional[str] = None
     to_address: Optional[str] = None
     comment: Optional[str] = None
 
 
-class MasqOut(BaseModel):
+class SnatOut(BaseModel):
     id: int
     config_id: int
     source_network: str
@@ -192,4 +192,4 @@ class GenerateOut(BaseModel):
     interfaces: str
     policy: str
     rules: str
-    masq: str
+    snat: str