Add RBAC: admin user management, audit log, runtime settings, delete PC

server/database.py

@@ -24,3 +24,17 @@ def get_db():
 
 def create_tables():
     Base.metadata.create_all(bind=engine)
+
+
+def run_migrations():
+    """Apply lightweight schema migrations for SQLite."""
+    from sqlalchemy import inspect, text
+    insp = inspect(engine)
+
+    # AuditLog: add username column if missing
+    if "audit_log" in insp.get_table_names():
+        audit_cols = {c["name"] for c in insp.get_columns("audit_log")}
+        if "username" not in audit_cols:
+            with engine.connect() as conn:
+                conn.execute(text("ALTER TABLE audit_log ADD COLUMN username TEXT"))
+                conn.commit()