feat: Implement project management with new models, repositories, and API endpoints, and enhance character management with project association and DTOs.

models/Generation.py

@@ -34,8 +34,9 @@ class Generation(BaseModel):
     input_token_usage: Optional[int] = None
     output_token_usage: Optional[int] = None
     is_deleted: bool = False
-    album_id: Optional[str] = None
-    created_by: Optional[str] = None
+    album_id: Optional[str] = None  
+    created_by: Optional[str] = None  # Stores User ID (Telegram ID or Web User ObjectId)
+    project_id: Optional[str] = None
     created_at: datetime = Field(default_factory=lambda: datetime.now(UTC))
     updated_at: datetime = Field(default_factory=lambda: datetime.now(UTC))