Sprint 27: end-of-sprint architecture refactor pass

editor/src/ConstraintSchemaFailurePacket.h

@@ -0,0 +1,23 @@
+#pragma once
+// Sprint 27 refactor: shared schema-failure packet helper
+
+#include <string>
+#include <vector>
+
+#include "ConstraintViolationDiagnostics.h"
+
+inline ConstraintDiagnosticPacket makeUnderConstrainedContractPacket(
+    const std::vector<std::string>& errors) {
+    ConstraintDiagnosticPacket packet;
+    packet.ok = false;
+    packet.recommendedAction = "escalate";
+    for (const auto& error : errors) {
+        packet.violations.push_back({
+            "under_constrained_contract",
+            "Taskitem contract failed schema validation",
+            error,
+            false
+        });
+    }
+    return packet;
+}