fix(results): gate operational AI exports on QA

backend/app/schemas/export.py

@@ -10,6 +10,7 @@ from app.schemas.operations import VectorSelectionBBox
 
 
 ExportKind = Literal["dataset", "detection_run", "segmentation_run", "vector_selection"]
+DetectionExportIntendedUse = Literal["review", "operational"]
 MapResultMode = Literal["current", "evolution"]
 
 
@@ -21,6 +22,7 @@ class GeoJsonExportRequest(BaseModel):
     name: str | None = None
     bbox: VectorSelectionBBox | None = None
     limit: int = 250
+    intended_use: DetectionExportIntendedUse = "review"
 
     @model_validator(mode="after")
     def validate_target(self) -> "GeoJsonExportRequest":
@@ -33,6 +35,8 @@ class GeoJsonExportRequest(BaseModel):
                 raise ValueError("bbox is required for vector selection GeoJSON exports")
         if self.export_kind in {"detection_run", "segmentation_run"} and self.analysis_run_id is None:
             raise ValueError("analysis_run_id is required for run GeoJSON exports")
+        if self.intended_use == "operational" and self.export_kind != "detection_run":
+            raise ValueError("operational intended_use is supported only for detection run exports")
         return self