fix(models): disambiguate repair estimate user relationships

backend/hermes/app/models/inventory.py

@@ -103,7 +103,11 @@ class InventoryStockMovement(Base):
     created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
 
     item: Mapped[InventoryItem] = relationship(back_populates="movements")
-    actor = relationship("User", lazy="joined")
+    actor = relationship(
+        "User",
+        foreign_keys="InventoryStockMovement.actor_user_id",
+        lazy="joined",
+    )
 
     @property
     def actor_username(self) -> str: