feat: add semantic GIS selection metrics

backend/app/schemas/__init__.py

@@ -79,6 +79,7 @@ from .operations import (
     VectorSelectionDeriveRequest,
     VectorSelectionRequest,
     VectorSelectionResponse,
+    VectorSelectionMetric,
     VectorSelectionSummary,
     VectorStatsRequest,
     VectorStatsResponse,
@@ -143,6 +144,7 @@ __all__ = [
     "VectorSelectionDeriveRequest",
     "VectorSelectionRequest",
     "VectorSelectionResponse",
+    "VectorSelectionMetric",
     "VectorSelectionSummary",
     "RasterClipRequest",
     "RasterStatsResponse",

backend/app/schemas/operations.py

@@ -220,14 +220,26 @@ class VectorSelectionDeriveRequest(VectorSelectionRequest):
     output_name: str | None = None
 
 
+class VectorSelectionMetric(BaseModel):
+    metric_key: str
+    metric_label: str
+    metric_value: float
+    metric_unit: str
+    aggregation_method: str
+    is_estimate: bool = False
+    warning: str | None = None
+
+
 class VectorSelectionSummary(BaseModel):
     metric_label: str
     metric_value: float
     metric_unit: str
     aggregation_method: str
+    primary_metric_key: str | None = None
     feature_count: int
     is_estimate: bool = False
     warning: str | None = None
+    metrics: list[VectorSelectionMetric] = Field(default_factory=list)
 
 
 class VectorSelectionResponse(BaseModel):