Feature - add logs for admin user

backend/app/models/__init__.py

@@ -2,6 +2,7 @@ from app.models.document import FilledDocument
 from app.models.template import DocumentTemplate, TemplateVariable
 from app.models.user import User, UserRole
 from app.models.verification_token import TokenType, VerificationToken
+from app.models.audit_log import AuditLog
 
 __all__ = [
     "User",
@@ -11,4 +12,5 @@ __all__ = [
     "FilledDocument",
     "VerificationToken",
     "TokenType",
+    "AuditLog",
 ]

backend/app/models/audit_log.py

@@ -0,0 +1,24 @@
+from datetime import datetime
+
+from sqlalchemy import DateTime, ForeignKey, Integer, String, Text
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.database import Base
+
+
+class AuditLog(Base):
+    __tablename__ = "audit_logs"
+
+    id: Mapped[int] = mapped_column(primary_key=True, index=True)
+    user_id: Mapped[int | None] = mapped_column(
+        ForeignKey("users.id", ondelete="SET NULL"), nullable=True
+    )
+    username: Mapped[str | None] = mapped_column(String(100), nullable=True)
+    action: Mapped[str] = mapped_column(String(100), index=True)
+    resource_type: Mapped[str | None] = mapped_column(String(50), nullable=True)
+    resource_id: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    details: Mapped[str | None] = mapped_column(Text, nullable=True)
+    ip_address: Mapped[str | None] = mapped_column(String(45), nullable=True)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime, default=datetime.utcnow, index=True
+    )