feat:Update benfitsDate query to add retrieve worker benefits query

backend/dataconnect/connector/benefitsData/queries.gql

@@ -1,4 +1,38 @@
 
+# ----------------------------------------------------------
+# GET WORKER BENEFIT BALANCES (M4)
+# Returns all active benefit plans with balance data for a given worker.
+# Supports: Sick Leave (40h), Holidays (24h), Vacation (40h)
+# Extensible: any future VendorBenefitPlan will appear automatically.
+#
+# Fields:
+#   vendorBenefitPlan.title       → benefit type name
+#   vendorBenefitPlan.total       → total entitlement (hours)
+#   current                       → used hours
+#   remaining = total - current   → computed client-side
+# ----------------------------------------------------------
+query getWorkerBenefitBalances(
+  $staffId: UUID!
+) @auth(level: USER) {
+  benefitsDatas(
+    where: {
+      staffId: { eq: $staffId }
+    }
+  ) {
+    vendorBenefitPlanId
+    current
+
+    vendorBenefitPlan {
+      id
+      title
+      description
+      requestLabel
+      total
+      isActive
+    }
+  }
+}
+
 # ----------------------------------------------------------
 # LIST ALL (admin/debug)
 # ----------------------------------------------------------