Рабочий пайплайн: YouTube -> транскрипция -> выжимка -> Postgres

- новый api/: /pipeline/process (yt-dlp, субтитры или Vosk, LLM/экстрактивная
  суммаризация), /videos, /llm; старый код перенесён в api_legacy/
- web/: Flet UI (flet 0.28.3 + flet-web, порт 8550)
- Dockerfile.api: ffmpeg слоем из mwader/static-ffmpeg, pip с кэш-маунтом
- requirements/pyproject: убраны moviepy, imageio-ffmpeg, битый asyncio
- README с инструкцией запуска и загрузкой Vosk-модели

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

api/route/videos.py

@@ -0,0 +1,55 @@
+from datetime import datetime
+from typing import List
+
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel
+
+from api.db.video import delete_video, get_video, list_videos
+
+
+router = APIRouter(prefix="/videos", tags=["videos"])
+
+
+class VideoOut(BaseModel):
+    uuid: str
+    source_url: str
+    title: str
+    video_path: str
+    text_full_path: str
+    text_summary_path: str
+    transcription_method: str
+    created_at: datetime
+
+
+def _to_out(v) -> VideoOut:
+    return VideoOut(
+        uuid=v.uuid,
+        source_url=v.source_url,
+        title=v.title,
+        video_path=v.video_path,
+        text_full_path=v.text_full_path,
+        text_summary_path=v.text_summary_path,
+        transcription_method=v.transcription_method,
+        created_at=v.created_at,
+    )
+
+
+@router.get("/", response_model=List[VideoOut])
+async def list_all():
+    return [_to_out(v) for v in await list_videos()]
+
+
+@router.get("/{video_uuid}", response_model=VideoOut)
+async def get_one(video_uuid: str):
+    v = await get_video(video_uuid)
+    if not v:
+        raise HTTPException(status_code=404, detail="Video not found")
+    return _to_out(v)
+
+
+@router.delete("/{video_uuid}")
+async def delete_one(video_uuid: str):
+    ok = await delete_video(video_uuid)
+    if not ok:
+        raise HTTPException(status_code=404, detail="Video not found")
+    return {"ok": True}