init: new structure + fix lint errors

cpv3/modules/files/service.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+import uuid
+
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from cpv3.modules.files.models import File
+from cpv3.modules.files.repository import FileRepository
+from cpv3.modules.files.schemas import FileCreate, FileUpdate
+from cpv3.modules.users.models import User
+
+
+class FileService:
+    """Service for file business logic and orchestration."""
+
+    def __init__(self, session: AsyncSession) -> None:
+        self._repo = FileRepository(session)
+
+    async def list_files(self, *, requester: User) -> list[File]:
+        return await self._repo.list_all(requester=requester)
+
+    async def get_file(self, file_id: uuid.UUID) -> File | None:
+        return await self._repo.get_by_id(file_id)
+
+    async def create_file(self, *, requester: User, data: FileCreate) -> File:
+        return await self._repo.create(requester=requester, data=data)
+
+    async def update_file(self, file: File, data: FileUpdate) -> File:
+        return await self._repo.update(file, data)
+
+    async def delete_file(self, file: File) -> None:
+        await self._repo.mark_deleted(file)