implement JellyStat API for watch history, genre summary, and user summary; add PostgreSQL connection pool and update requirements

gateway/jellystat/models.py

@@ -0,0 +1,36 @@
+"""Pydantic response models for the JellyStat API."""
+
+from pydantic import BaseModel
+
+
+class WatchHistoryItem(BaseModel):
+    title: str
+    watch_time_sec: float
+    media_type: str
+
+
+class WatchHistoryResponse(BaseModel):
+    user_id: str
+    window_minutes: int
+    items: list[WatchHistoryItem]
+
+
+class GenreSummaryItem(BaseModel):
+    genre: str
+    watch_time_sec: float
+
+
+class GenreSummaryResponse(BaseModel):
+    user_id: str
+    window_minutes: int
+    genres: list[GenreSummaryItem]
+
+
+class UserSummaryResponse(BaseModel):
+    user_id: str
+    total_watch_time_sec: float
+    most_watched_series: str | None
+    most_watched_movie: str | None
+    total_last_30d_sec: float
+    total_last_7d_sec: float
+    top_genres: list[str]