Add unified channel feed

config.py

@@ -6,6 +6,9 @@ Environment Variables:
     ELASTIC_USERNAME / ELASTIC_PASSWORD: Optional basic auth credentials.
     ELASTIC_INDEX: Target index name (default: this_little_corner_py).
     LOCAL_DATA_DIR: Root folder containing JSON metadata (default: ../data/video_metadata).
+    CHANNELS_PATH: Path to the canonical channel list (default: ./channels.yml).
+    RSS_FEED_URL: Public URL/path for the unified RSS feed (default: /rss/youtube-unified).
+    RSS_FEED_UPSTREAM: Base URL to proxy feed requests (default: http://localhost:8097).
     YOUTUBE_API_KEY: Optional API key for pulling metadata directly from YouTube.
     RATE_LIMIT_ENABLED: Toggle API rate limiting (default: 1).
     RATE_LIMIT_REQUESTS: Max requests per window per client (default: 60).
@@ -74,6 +77,9 @@ class AppConfig:
     qdrant_vector_name: Optional[str]
     qdrant_vector_size: int
     qdrant_embed_model: str
+    channels_path: Path
+    rss_feed_url: str
+    rss_feed_upstream: str
 
 
 def _env(name: str, default: Optional[str] = None) -> Optional[str]:
@@ -110,6 +116,11 @@ def load_config() -> AppConfig:
         requests=max(int(_env("RATE_LIMIT_REQUESTS", "60")), 0),
         window_seconds=max(int(_env("RATE_LIMIT_WINDOW_SECONDS", "60")), 1),
     )
+    channels_path = Path(
+        _env("CHANNELS_PATH", str(Path(__file__).parent / "channels.yml"))
+    ).expanduser()
+    rss_feed_url = _env("RSS_FEED_URL", "/rss/youtube-unified")
+    rss_feed_upstream = _env("RSS_FEED_UPSTREAM", "http://localhost:8097")
     return AppConfig(
         elastic=elastic,
         data=data,
@@ -120,6 +131,9 @@ def load_config() -> AppConfig:
         qdrant_vector_name=_env("QDRANT_VECTOR_NAME"),
         qdrant_vector_size=int(_env("QDRANT_VECTOR_SIZE", "1024")),
         qdrant_embed_model=_env("QDRANT_EMBED_MODEL", "BAAI/bge-large-en-v1.5"),
+        channels_path=channels_path,
+        rss_feed_url=rss_feed_url or "",
+        rss_feed_upstream=rss_feed_upstream or "",
     )