Add .gitattributes: LF in the repository, CRLF for batch files

Normalize the files that had been committed with CRLF (line endings only,
no content changes).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

backend/app/import_dir.py

@@ -1,48 +1,48 @@
-"""Import an already unpacked game from a folder on the server.
-
-    python -m app.import_dir /games/Some-Game [--title "Name"] [--owner admin]
-
-The folder is only read; the converted copy goes to the blob store like an upload.
-"""
-
-import argparse
-import asyncio
-from pathlib import Path
-
-from sqlalchemy import select
-
-from app.db import SessionLocal
-from app.models import Game, GameVersion, Role, User
-from app.worker import convert
-
-
-async def main() -> None:
-    ap = argparse.ArgumentParser()
-    ap.add_argument("path", type=Path)
-    ap.add_argument("--title")
-    ap.add_argument("--owner", help="username; defaults to the first admin")
-    args = ap.parse_args()
-    if not args.path.is_dir():
-        raise SystemExit(f"{args.path} is not a directory")
-
-    async with SessionLocal() as db:
-        stmt = select(User).join(Role).order_by(User.id)
-        stmt = stmt.where(User.username == args.owner) if args.owner else stmt.where(Role.name == "admin")
-        owner = await db.scalar(stmt.limit(1))
-        if owner is None:
-            raise SystemExit("owner not found")
-        game = Game(title=args.title or args.path.name, created_by_id=owner.id)
-        db.add(game)
-        await db.flush()
-        version = GameVersion(game_id=game.id, owner_id=owner.id, name="Оригинал",
-                              upload_name=args.path.name, status="importing")
-        db.add(version)
-        await db.commit()
-        game_id, version_id = game.id, version.id
-
-    ok = await convert(version_id, args.path, args.path.name)
-    print(f"game {game_id}, version {version_id}: {'ready' if ok else 'failed'}")
-
-
-if __name__ == "__main__":
-    asyncio.run(main())
+"""Import an already unpacked game from a folder on the server.
+
+    python -m app.import_dir /games/Some-Game [--title "Name"] [--owner admin]
+
+The folder is only read; the converted copy goes to the blob store like an upload.
+"""
+
+import argparse
+import asyncio
+from pathlib import Path
+
+from sqlalchemy import select
+
+from app.db import SessionLocal
+from app.models import Game, GameVersion, Role, User
+from app.worker import convert
+
+
+async def main() -> None:
+    ap = argparse.ArgumentParser()
+    ap.add_argument("path", type=Path)
+    ap.add_argument("--title")
+    ap.add_argument("--owner", help="username; defaults to the first admin")
+    args = ap.parse_args()
+    if not args.path.is_dir():
+        raise SystemExit(f"{args.path} is not a directory")
+
+    async with SessionLocal() as db:
+        stmt = select(User).join(Role).order_by(User.id)
+        stmt = stmt.where(User.username == args.owner) if args.owner else stmt.where(Role.name == "admin")
+        owner = await db.scalar(stmt.limit(1))
+        if owner is None:
+            raise SystemExit("owner not found")
+        game = Game(title=args.title or args.path.name, created_by_id=owner.id)
+        db.add(game)
+        await db.flush()
+        version = GameVersion(game_id=game.id, owner_id=owner.id, name="Оригинал",
+                              upload_name=args.path.name, status="importing")
+        db.add(version)
+        await db.commit()
+        game_id, version_id = game.id, version.id
+
+    ok = await convert(version_id, args.path, args.path.name)
+    print(f"game {game_id}, version {version_id}: {'ready' if ok else 'failed'}")
+
+
+if __name__ == "__main__":
+    asyncio.run(main())