feat(auth): enterprise authentication and user management

backend/hermes/app/models/user.py

@@ -1,4 +1,9 @@
+from datetime import datetime
+
+from sqlalchemy import Boolean
+from sqlalchemy import DateTime
 from sqlalchemy import String
+from sqlalchemy import func
 from sqlalchemy.orm import Mapped
 from sqlalchemy.orm import mapped_column
 
@@ -10,6 +15,18 @@ class User(Base):
 
     id: Mapped[int] = mapped_column(primary_key=True)
 
+    first_name: Mapped[str] = mapped_column(
+        String(100),
+        default="",
+        server_default=""
+    )
+
+    last_name: Mapped[str] = mapped_column(
+        String(100),
+        default="",
+        server_default=""
+    )
+
     username: Mapped[str] = mapped_column(
         String(50),
         unique=True,
@@ -23,4 +40,27 @@ class User(Base):
 
     password_hash: Mapped[str] = mapped_column(
         String(255)
-    )
+    )
+
+    role: Mapped[str] = mapped_column(
+        String(50),
+        default="user",
+        server_default="user"
+    )
+
+    is_active: Mapped[bool] = mapped_column(
+        Boolean,
+        default=True,
+        server_default="true"
+    )
+
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        server_default=func.now()
+    )
+
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        server_default=func.now(),
+        onupdate=func.now()
+    )