feat: add operational Dashboard

backend/app/repairs/center_service.py

@@ -2,6 +2,7 @@
 
 from app.repairs.center_repository import RepairCenterRepository
 from app.repairs.models import (
+    ActiveRepairSummary,
     RepairCenterAccess,
     RepairCenterCapabilities,
     RepairCenterFilters,
@@ -94,3 +95,8 @@ class RepairCenterService:
                 location_options=location_options,
             ),
         )
+
+    def summarize_active_repairs(self) -> ActiveRepairSummary:
+        return ActiveRepairSummary.model_validate(
+            self.repository.summarize_active_repairs()
+        )