Initial commit: SQL audit platform v0.1.0

FastAPI backend with auth, user, instance, ticket, query, dashboard APIs.
React + TypeScript frontend with mock data UI (10 pages).
SQLite + async SQLAlchemy, JWT auth, role-based access control.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/app/models/user.py

@@ -0,0 +1,19 @@
+from sqlalchemy import Column, Integer, String, Boolean, DateTime, func
+
+from app.core.database import Base
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    username = Column(String(50), unique=True, nullable=False, index=True)
+    display_name = Column(String(100), nullable=False)
+    email = Column(String(100), unique=True, nullable=True)
+    phone = Column(String(20), nullable=True)
+    hashed_password = Column(String(200), nullable=False)
+    role = Column(String(20), nullable=False, default="developer")  # admin / dba / developer / guest
+    is_active = Column(Boolean, default=True)
+    last_login = Column(DateTime, nullable=True)
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())