feat: add data models for Track, Show, ShowTrack

Made-with: Cursor

src/ntr_fetcher/models.py

@@ -0,0 +1,30 @@
+from dataclasses import dataclass
+from datetime import datetime
+
+
+@dataclass(frozen=True)
+class Track:
+    id: int
+    title: str
+    artist: str
+    permalink_url: str
+    artwork_url: str | None
+    duration_ms: int
+    license: str
+    liked_at: datetime
+    raw_json: str
+
+
+@dataclass(frozen=True)
+class Show:
+    id: int
+    week_start: datetime
+    week_end: datetime
+    created_at: datetime
+
+
+@dataclass(frozen=True)
+class ShowTrack:
+    show_id: int
+    track_id: int
+    position: int