fix: retry reviewed chat setup after temporary contention (#19787)

Retry reviewed chat preparation with the original accepted input.

Bound retries for authorization proof waits that expire before provider
work. Preserve the original answer receipt and queue later wakes
separately. Keep plan confirmation semantics by assigning the interaction
marker only to question answer delivery and legacy question payloads.

Verification: 433 tests across four backend suites, all 17 project-chat
browser tests, and all server source/test typecheck layers passed. The
plan approval regression was reproduced on the previous head before the
fix. All applicable CI passed and exact-head Greptile Apex scored 5/5.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

server/src/modules/wake-queue/domain/context.ts

@@ -83,12 +83,20 @@ export function wakeMustNotJoinActiveRun(
 ): boolean {
   // A context compaction run does no task work, so ordinary wakes and
   // compactions never merge, in either arrival order.
-  return interactionReceipt || Boolean(parseObject(activeRunContext).interactionId) ||
+  return hasRetainedExternalChatRetry(activeRunContext) || interactionReceipt || Boolean(parseObject(activeRunContext).interactionId) ||
     Boolean(readNonEmptyString(parseObject(activeRunContext).contextCompactionRequestId)) ||
     Boolean(readNonEmptyString(wakeContext.contextCompactionRequestId)) ||
     wakeChatConversationsConflict(activeRunContext, wakeContext);
 }
 
+export function hasRetainedExternalChatRetry(context: unknown): boolean {
+  const active = parseObject(context);
+  const activeSource = readNonEmptyString(active.source);
+  return readNonEmptyString(active.retryOfRunId) !== null &&
+    (activeSource?.startsWith("chat:") === true ||
+      (activeSource === "issue.interaction.respond" && active.externalChatContinuation === true));
+}
+
 function isInteractionResolutionWakePayload(payload: Record<string, unknown> | null | undefined): boolean {
   return readNonEmptyString(payload?.mutation) === "interaction";
 }

server/src/modules/wake-queue/index.ts

@@ -28,6 +28,7 @@ export type {
   RunSummary,
 } from "./application/types.js";
 export { WakeQueueApplicationError } from "./application/types.js";
+export { hasRetainedExternalChatRetry } from "./domain/context.js";
 export type {
   IssueSnapshot,
   RunSnapshot,