fix(report): persist longform appendix on self-hosted upsert (BUG-576)

Engine calls already returned markdown; the worker failed because local postgres upsert required onConflict and the appendix write omitted it.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/components/personal-report/personal-report-page.tsx

@@ -32,7 +32,7 @@ export type ReportLoadState =
   | { phase: "not-found" }
   | { phase: "generating"; progressPercent?: number; progressPhase?: string }
   | { phase: "timed-out" }
-  | { phase: "failed"; failureCode: string | null; failureSummary?: string | null }
+  | { phase: "failed"; failureCode: string | null; failureSummary?: string | null; appendixLastErrorCode?: string | null }
   | { phase: "invalid"; message: string }
   | { phase: "network-error" }
   | { phase: "markdown-ready"; markdown: string; reportId: string; createdAt: string }
@@ -47,6 +47,7 @@ export interface ReportEnvelopeView {
   status: string;
   failureCode: string | null;
   failureSummary?: string | null;
+  appendixLastErrorCode?: string | null;
   createdAt: string;
   completedAt: string | null;
   progressPercent?: number;
@@ -108,10 +109,15 @@ export function classifyReportEnvelope(statusCode: number, json: unknown): Repor
       const summary = typeof view.failureSummary === "string" && view.failureSummary.length > 0
         ? view.failureSummary
         : null;
+      const appendixLastErrorCode = typeof view.appendixLastErrorCode === "string"
+        && view.appendixLastErrorCode.length > 0
+        ? view.appendixLastErrorCode
+        : null;
       return {
         phase: "failed",
-        failureCode: code,
+        failureCode: appendixLastErrorCode ?? code,
         ...(summary ? { failureSummary: summary } : {}),
+        ...(appendixLastErrorCode ? { appendixLastErrorCode } : {}),
       };
     }
     default: