WIP checkpoint: Scaffold FastAPI backend project structure

backend/app/models/asset.py

@@ -1,4 +1,5 @@
-from sqlalchemy import Column, Integer, String, ForeignKey, Text, DateTime, Enum as SAEnum
+from sqlalchemy import Column, Integer, String, ForeignKey, Text, DateTime, Boolean
+from sqlalchemy.dialects.postgresql import ENUM
 from sqlalchemy.orm import relationship
 from sqlalchemy.sql import func
 import enum
@@ -21,14 +22,17 @@ class Asset(Base):
     id = Column(Integer, primary_key=True, index=True)
     name = Column(String(255), nullable=False)
     description = Column(Text, nullable=True)
-    asset_type = Column(SAEnum(AssetType), nullable=False)
+    asset_type = Column(
+        ENUM(AssetType, name="asset_type", create_type=False),
+        nullable=False,
+    )
     file_path = Column(String(512), nullable=False)
     file_size = Column(Integer, nullable=True)
     mime_type = Column(String(128), nullable=True)
     metadata_json = Column(Text, nullable=True)
     world_id = Column(Integer, ForeignKey("worlds.id"), nullable=True)
     owner_id = Column(Integer, ForeignKey("users.id"), nullable=False)
-    is_public = Column(Integer, default=0, nullable=False)
+    is_public = Column(Boolean, default=False, nullable=False)
     created_at = Column(DateTime(timezone=True), server_default=func.now())
     updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
 

backend/app/models/session.py

@@ -1,6 +1,6 @@
 import uuid
 
-from sqlalchemy import Column, String, DateTime, ForeignKey, Boolean
+from sqlalchemy import Column, Integer, String, DateTime, ForeignKey, Boolean
 from sqlalchemy.orm import relationship
 from sqlalchemy.sql import func
 from app.database import Base