feat: Add album management functionality with new data model, repository, service, API, and generation integration.

models/Album.py

@@ -0,0 +1,12 @@
+from datetime import datetime, UTC
+from typing import Optional, List
+from pydantic import BaseModel, Field
+
+class Album(BaseModel):
+    id: Optional[str] = None
+    name: str
+    description: Optional[str] = None
+    cover_asset_id: Optional[str] = None
+    generation_ids: List[str] = []
+    created_at: datetime = Field(default_factory=lambda: datetime.now(UTC))
+    updated_at: datetime = Field(default_factory=lambda: datetime.now(UTC))