database driven image uploader and storage service model

backend/app/models.py

@@ -1,6 +1,10 @@
+from datetime import datetime, timezone
+
 from sqlalchemy import (
     Column,
+    DateTime,
     Integer,
+    LargeBinary,
     String,
     Text,
     Numeric,
@@ -133,3 +137,14 @@ class CommunityHighlight(Base):
     description = Column(Text, nullable=False)
     display_order = Column(Integer, nullable=False)
     active = Column(Boolean, default=True)
+
+
+class StorageBlob(Base):
+    __tablename__ = "storage_blobs"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    blob_id = Column(String(32), unique=True, nullable=False, index=True)
+    content_type = Column(String(100), nullable=False)
+    size = Column(Integer, nullable=False)
+    data = Column(LargeBinary, nullable=False)
+    created_at = Column(DateTime, nullable=False, default=lambda: datetime.now(timezone.utc))