feat(sync): 长语音音频本地化(voice_clip media_hash+download+local-first playback)

Mirror download_call_recordings pattern for voice_clips:
- VoiceClip.media_hash column + Alembic migration (c4d5e6f7a8b9)
- VoiceClipOut.media_hash + frontend VoiceClip.media_hash type
- download_voice_clip_audio in app/scraper/media.py (resilient, sha256-dedup,
  same download_url/upsert_media helpers as call recordings)
- sync_voice_clip_audio orchestrator wrapper (commits own SyncRun, mirrors
  sync_call_recordings semantics)
- scheduler: _run_voice_clip_audio + ENTITY_FUNCS['voice_clip_audio'] +
  appended to daily _run_all job (after voice_clips)
- VoiceClipModal playClip local-first: /api/media/{media_hash} with OSS
  oss_file_name fallback (mirrors CallList.playRecord)

Tested: 376 pytest pass; vue-tsc clean; migration applied; 1523/1533 clips
localized (10 pending are genuine upstream HTTP 404s — resilient skip).

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

yunke-server/app/sync/scheduler.py

@@ -59,6 +59,7 @@ from app.sync.orchestrator import (
     sync_departments,
     sync_phone_calls,
     sync_sms,
+    sync_voice_clip_audio,
     sync_voice_clips,
     sync_wa_voice_calls,
     sync_wechat_accounts,
@@ -203,6 +204,13 @@ async def _run_call_recordings(
     return [await sync_call_recordings(session, client, store)]
 
 
+async def _run_voice_clip_audio(
+    session: AsyncSession, client: YunkeClient, store: ObjectStore
+) -> list[SyncResult]:
+    """Audio-localization pass for already-mirrored ``voice_clip`` rows."""
+    return [await sync_voice_clip_audio(session, client, store)]
+
+
 async def _run_messages(
     session: AsyncSession, client: YunkeClient, store: ObjectStore
 ) -> list[SyncResult]:
@@ -276,6 +284,12 @@ async def _run_all(
     # tables. Must run AFTER wechat_accounts + wa_accounts (which seed the
     # user_id -> channel mapping the voice-clip sync reads).
     results.append(await sync_voice_clips(session, client))
+    # Voice-clip audio localization: download OSS audio for already-mirrored
+    # voice_clip rows. Runs AFTER voice_clips so freshly-scraped rows are
+    # eligible. Commits internally (mirrors call_recordings) — placing it last
+    # in the daily job means no later in-batch entity can be affected by the
+    # mid-batch commit boundary.
+    results.append(await sync_voice_clip_audio(session, client, store))
     return results
 
 
@@ -297,6 +311,7 @@ ENTITY_FUNCS: dict[
     "sms": _run_sms,
     "voice_clips": _run_voice_clips,
     "call_recordings": _run_call_recordings,
+    "voice_clip_audio": _run_voice_clip_audio,
     "messages": _run_messages,
     "wa_messages": _run_wa_messages,
     "all_wechat": _run_all_wechat,