fix(rectification): 分类器失败、引擎忙、整轮超时不再归因错

点选题把分类器两次异常说成用户没说清（BUG-722）；引擎 429 被压成坏了且重算静默失败（BUG-723）；两次 attempt 总预算大于路由 maxDuration（BUG-724）。本单只改归因：classifier_unavailable 请用户重发、busy 分档并可见「这次没有重新比较」、整轮 225s 预算不够则 host fallback。不改计费、分类模型、并发闸门。
2026-09-16 07:06:57 +08:00
parent 11893c7f97
commit 8b982baf64
23 changed files with 952 additions and 104 deletions
@@ -35,7 +35,6 @@ import { defaultMessageOrigin, isRectificationMessageOrigin } from "@/lib/rectif
 import { previousInferenceFromReceipt } from "@/lib/rectification-agentic/v9/inference-adapter";
 import { CHOICE_STOP_LABEL, parseAgentChoiceCopy } from "@/lib/rectification-agentic/v9/choice-card";
 import {
-  classifyRectificationTurnIntent,
  optionIdForAnswerClass,
  collectFocusCloseStatus,
  shouldContinueAgentForDatedEvent,
@@ -459,7 +458,16 @@ export async function POST(request: Request) {
        const classified = intent.classified;
        expectedWrite = intent.expectedWrite;
        writeClassified = true;
-        if (!classified || classified.intent === "unclear") {
+        if (intent.outcome === "classifier_unavailable") {
+          const narration = RECTIFICATION_USER_COPY.classifierUnavailableReply;
+          const turn = await persistV9DeterministicTurn(accounting, userId, caseId, {
+            requestId,
+            userMessage: parsed.data.message ?? null,
+            assistantMessage: narration,
+          });
+          return completedMessageResponse(narration, requestId, caseId, turn.turnId);
+        }
+        if (intent.outcome === "unclear") {
          const narration = RECTIFICATION_USER_COPY.unclearFocusReply;
          const turn = await persistV9DeterministicTurn(accounting, userId, caseId, {
            requestId,
@@ -468,7 +476,7 @@ export async function POST(request: Request) {
          });
          return completedMessageResponse(narration, requestId, caseId, turn.turnId);
        }
-        if (classified.intent === "answer_current_focus") {
+        if (classified?.intent === "answer_current_focus") {
          if (!classified.answer_class) {
            return completedMessageResponse(RECTIFICATION_USER_COPY.questionUpdated, requestId, caseId);
          }
@@ -499,7 +507,7 @@ export async function POST(request: Request) {
            return completedMessageResponse(applied.narration, requestId, caseId, applied.turnId);
          }
        }
-        if (classified.intent === "stop_rectification" || classified.intent === "ask_about_result") {
+        if (classified?.intent === "stop_rectification" || classified?.intent === "ask_about_result") {
          const previous = previousInferenceFromReceipt(dossier.latestResult?.decisionReceipt ?? null);
          const applied = await applyRectificationChoice(accounting, {
            userId,
@@ -631,16 +639,21 @@ export async function POST(request: Request) {
          });
          const open = openQuestionFromPersistedFocus(persisted);
          if (open && persisted.focus && isRenderableChoiceOpenQuestion(open)) {
-            let classified = null;
-            try {
-              classified = await classifyRectificationTurnIntent(selectedModel, {
-                focus: persisted.focus,
-                userMessage: parsed.data.message ?? "",
-                caseStatus,
-                signal: request.signal,
+            const intent = await classifyTurnIntentWithRetry(resolvedModel, {
+              focus: persisted.focus,
+              userMessage: parsed.data.message ?? "",
+              caseStatus,
+              signal: request.signal,
+            });
+            const classified = intent.classified;
+            if (intent.outcome === "classifier_unavailable") {
+              const narration = RECTIFICATION_USER_COPY.classifierUnavailableReply;
+              const turn = await persistV9DeterministicTurn(accounting, userId, caseId, {
+                requestId,
+                userMessage: parsed.data.message ?? null,
+                assistantMessage: narration,
              });
-            } catch {
-              classified = null;
+              return completedMessageResponse(narration, requestId, caseId, turn.turnId);
            }
            if (classified?.intent === "answer_current_focus" && classified.answer_class) {
              const optionId = optionIdForAnswerClass(persisted.focus, classified.answer_class);