fix(users): repair create delete and duplicate email handling

validation-suite/backend/mercury/app/models/user.py

@@ -4,7 +4,7 @@ import enum
 from datetime import datetime
 
 from sqlalchemy import Boolean, DateTime, String
-from sqlalchemy.orm import Mapped, mapped_column
+from sqlalchemy.orm import Mapped, mapped_column, validates
 
 from app.db.base import Base, TimestampMixin, UUIDMixin
 
@@ -20,15 +20,21 @@ class User(Base, UUIDMixin, TimestampMixin):
     __tablename__ = "users"
 
     email: Mapped[str] = mapped_column(String(255), unique=True, index=True)
+    full_name: Mapped[str] = mapped_column(String(160), nullable=False)
     first_name: Mapped[str] = mapped_column(String(80))
     last_name: Mapped[str] = mapped_column(String(80))
-    role: Mapped[str] = mapped_column(String(40), default=UserRole.MITARBEITER.value)
+    role: Mapped[str] = mapped_column(String(50), nullable=False, default=UserRole.MITARBEITER.value)
     password_hash: Mapped[str] = mapped_column(String(255))
     is_active: Mapped[bool] = mapped_column(Boolean, default=True)
     must_change_password: Mapped[bool] = mapped_column(Boolean, default=True)
+    deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
     last_login_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
     password_changed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
 
-    @property
-    def full_name(self) -> str:
-        return f"{self.first_name} {self.last_name}".strip()
+    @validates("first_name", "last_name")
+    def _sync_full_name(self, key: str, value: str) -> str:
+        first_name = value if key == "first_name" else getattr(self, "first_name", None)
+        last_name = value if key == "last_name" else getattr(self, "last_name", None)
+        if first_name is not None and last_name is not None:
+            self.full_name = f"{first_name} {last_name}".strip()
+        return value