feat: add governed configuration reference selectors

src/govoplan_admin/backend/api/v1/schemas.py

@@ -437,6 +437,10 @@ class GovernanceTemplateItem(BaseModel):
 
 class GovernanceTemplateListResponse(BaseModel):
     templates: list[GovernanceTemplateItem]
+    total: int = 0
+    page: int = 1
+    page_size: int = 500
+    pages: int = 1
 
 
 class GovernanceTemplateListDeltaResponse(BaseModel):
@@ -445,6 +449,10 @@ class GovernanceTemplateListDeltaResponse(BaseModel):
     watermark: str | None = None
     has_more: bool = False
     full: bool = False
+    total: int = 0
+    page: int = 1
+    page_size: int = 500
+    pages: int = 1
 
 
 class GovernanceTemplateCreateRequest(BaseModel):