Initial commit: Phase 1 – Projektstruktur, DB-Schema, Core-API

- FastAPI-Backend mit vollständiger ABS v2.x API-Kompatibilität
- SQLAlchemy-Models: User, Library, LibraryItem, BookFile, Chapter,
  Podcast, PodcastEpisode, MediaProgress, Bookmark, PlaybackSession
- Auth: JWT-Login (/login, /logout, /api/authorize)
- Library + Items Endpoints inkl. camelCase ABS-Response-Format
- HLS-Streaming via FFmpeg (POST /api/items/:id/play, Session-Sync)
- Me/Progress Endpoints + Lesezeichen
- User-Management + Server-Settings (Admin)
- Library-Scanner (MP3/WAV Discovery, Hintergrund-Task)
- File Watcher (watchdog, 30s Debounce)
- Matching-Skelett (MusicBrainz, OpenLibrary, Google Books – Phase 5)
- Docker-Setup: backend (Python 3.12+FFmpeg), frontend (React/Vite),
  nginx Reverse-Proxy auf Port 3000
- setup.sh: Installiert Docker auf Debian/Ubuntu, richtet .env ein

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/schemas/podcast.py

@@ -0,0 +1,55 @@
+from pydantic import BaseModel, ConfigDict
+from pydantic.alias_generators import to_camel
+from datetime import datetime
+
+
+class PodcastEpisodeOut(BaseModel):
+    model_config = ConfigDict(alias_generator=to_camel, populate_by_name=True)
+    id: str
+    index: int = 0
+    season: str | None = None
+    episode: str | None = None
+    episode_type: str = "full"
+    title: str | None = None
+    subtitle: str | None = None
+    description: str | None = None
+    enclosure: dict | None = None
+    pub_date: str | None = None
+    audio_file: dict | None = None
+    published_at: int | None = None
+    added_at: int = 0
+    updated_at: int = 0
+    duration: float = 0.0
+    size: int = 0
+
+
+class PodcastMetadata(BaseModel):
+    model_config = ConfigDict(alias_generator=to_camel, populate_by_name=True)
+    title: str | None = None
+    author: str | None = None
+    description: str | None = None
+    release_date: str | None = None
+    genres: list[str] = []
+    feed_url: str | None = None
+    image_url: str | None = None
+    itunes_page_url: str | None = None
+    itunes_id: int | None = None
+    itunes_artist_id: int | None = None
+    explicit: bool = False
+    language: str | None = None
+    type: str = "episodic"
+
+
+class PodcastOut(BaseModel):
+    model_config = ConfigDict(alias_generator=to_camel, populate_by_name=True)
+    library_item_id: str
+    metadata: PodcastMetadata
+    cover_path: str | None = None
+    tags: list[str] = []
+    episodes: list[PodcastEpisodeOut] = []
+    auto_download_episodes: bool = False
+    auto_download_schedule: str = "0 * * * *"
+    last_episode_check: int | None = None
+    max_episodes_to_keep: int = 0
+    max_new_episodes_to_download: int = 3
+    num_episodes: int = 0