nice version

app/core/background/convert_v3_service.py

@@ -3,7 +3,7 @@ import os
 import json
 import shutil
 from datetime import datetime
-from typing import List, Tuple
+from typing import List, Tuple, Optional
 
 from sqlalchemy import select
 
@@ -57,7 +57,7 @@ async def _save_derivative(file_path: str, filename: str) -> Tuple[str, int]:
     return file_hash, size
 
 
-async def _run_media_converter(input_host_path: str, input_ext: str, quality: str, trim_value: str | None, is_audio: bool) -> Tuple[str, dict]:
+async def _run_media_converter(input_host_path: str, input_ext: str, quality: str, trim_value: Optional[str], is_audio: bool) -> Tuple[str, dict]:
     rid = __import__('uuid').uuid4().hex[:8]
     output_dir_container = f"/tmp/conv_{rid}"
     output_dir_host = f"/tmp/conv_{rid}"
@@ -215,7 +215,7 @@ async def _pick_pending(limit: int) -> List[Tuple[EncryptedContent, str]]:
             if required.issubset(kinds_ready):
                 continue
             # Always decrypt from IPFS using local or remote key
-            storage_path: str | None = None
+            storage_path: Optional[str] = None
             ck = (await session.execute(select(ContentKey).where(ContentKey.content_id == ec.id))).scalars().first()
             if ck:
                 storage_path = await stage_plain_from_ipfs(ec, ck.key_ciphertext_b64)
@@ -285,7 +285,7 @@ async def main_fn(memory):
     await worker_loop()
 
 
-async def stage_plain_from_ipfs(ec: EncryptedContent, dek_wrapped: str) -> str | None:
+async def stage_plain_from_ipfs(ec: EncryptedContent, dek_wrapped: str) -> Optional[str]:
     """Download encrypted ENCF stream from IPFS and decrypt on the fly into a temp file."""
     import tempfile
     try: