chore(confidence-engine): expose reconstruction fallback path

tests/reconstruction/compatibility.test.js

@@ -115,6 +115,12 @@ describe("analyseScenario compatibility", () => {
   it("preserves an attempted provider API path on provider failure", async () => {
     const providerError = new Error("Provider failed");
     providerError.providerApiPath = "/api/chat";
+    providerError.providerExecution = {
+      chatCapabilityDetected: true,
+      chatRequestAttempted: true,
+      chatRequestSucceeded: false,
+      generateRequestAttempted: true,
+    };
     mockGenerateReconstruction.mockRejectedValue(providerError);
 
     const { analyseScenario } = await import("@/lib/analysis.js");
@@ -125,6 +131,7 @@ describe("analyseScenario compatibility", () => {
     expect(result).toMatchObject({
       success: false,
       providerApiPath: "/api/chat",
+      providerExecution: providerError.providerExecution,
     });
   });