fix(api): return real total for user pagination

app/api/v1/endpoints/admin_metadata.py

@@ -7,6 +7,7 @@ from sqlalchemy.engine.url import make_url
 from sqlalchemy.exc import IntegrityError, SQLAlchemyError
 from sqlalchemy.ext.asyncio import create_async_engine
 
+from app.api.pagination import PaginatedList
 from app.auth.metadata_dependencies import (
     get_current_metadata_admin,
     get_metadata_repository,
@@ -236,7 +237,9 @@ async def list_metadata_users(
     metadata_repo: MetadataRepository = Depends(get_metadata_repository),
 ) -> List[MetadataUserResponse]:
     users = await metadata_repo.list_users(skip=skip, limit=limit)
-    return [MetadataUserResponse.model_validate(user) for user in users]
+    total = await metadata_repo.count_users()
+    items = [MetadataUserResponse.model_validate(user) for user in users]
+    return PaginatedList(items, total=total)
 
 
 @router.get("/admin/projects", response_model=List[AdminProjectResponse])

app/infra/db/metadb/repositories/metadata_repository.py

@@ -4,7 +4,7 @@ from typing import Optional, List
 from uuid import UUID, uuid4
 
 from cryptography.fernet import InvalidToken
-from sqlalchemy import delete, select
+from sqlalchemy import delete, func, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.core.encryption import (
@@ -122,6 +122,12 @@ class MetadataRepository:
         )
         return list(result.scalars().all())
 
+    async def count_users(self) -> int:
+        result = await self.session.execute(
+            select(func.count()).select_from(models.User)
+        )
+        return int(result.scalar() or 0)
+
     async def upsert_user_from_keycloak(
         self,
         *,