fix: degrade elder analysis when knowledge retrieval fails

modules/ai/server/analysis.ts

@@ -208,20 +208,23 @@ export async function generateElderAiAnalysis(
     : { success: true as const, data: { results: [] } };
 
   if (!knowledgeResults.success) {
-    await saveFailedAnalysis({
-      context,
+    await recordAuditLog({
+      actor: context.account,
       organizationId: residentContext.context.organizationId,
-      elderId,
-      dataScopes: residentContext.context.dataScopes,
-      category: "retrieval_failed",
+      action: "ai.knowledge.retrieve",
+      targetType: "elder",
+      targetId: elderId,
+      result: "failure",
+      reason: getBriefErrorReason("retrieval_failed"),
     });
-    return { success: false, reason: knowledgeResults.reason, status: knowledgeResults.status };
   }
 
-  const dataScopes = knowledgeResults.data.results.length > 0
+  const knowledgeItems = knowledgeResults.success ? knowledgeResults.data.results : [];
+  const knowledgeUnavailableReason = knowledgeResults.success ? "" : getBriefErrorReason("retrieval_failed");
+  const dataScopes = knowledgeItems.length > 0
     ? [...residentContext.context.dataScopes, "knowledge" as const]
     : residentContext.context.dataScopes;
-  const knowledgeCitations: AiCitation[] = knowledgeResults.data.results.map((item, index) => ({
+  const knowledgeCitations: AiCitation[] = knowledgeItems.map((item, index) => ({
     id: `kb-${index + 1}`,
     sourceType: "knowledge",
     sourceId: item.chunkId,
@@ -238,10 +241,11 @@ export async function generateElderAiAnalysis(
     "输出 JSON 字段：overallRiskLevel(low|medium|high|critical|unknown), summary, keyFindings, recommendations, dataGaps, citations, confidence, modelSummary。",
     "keyFindings[] 字段：category, severity(info|warning|critical), evidence, citationIds。",
     "recommendations[] 字段：title, priority(low|normal|high|urgent), rationale, suggestedNextStep, citationIds。",
+    knowledgeUnavailableReason ? `知识库检索不可用：${knowledgeUnavailableReason}。请在 dataGaps 中包含“知识库检索不可用，分析未使用内部知识库”。` : "",
     `modelSummary 固定为 {"provider":"openai-compatible","chatModel":"${runtimeConfig.config.chatModel}","embeddingModel":"${runtimeConfig.config.embeddingModel}"}。`,
     `可用 citations：${JSON.stringify(citations)}`,
     `住民上下文：\n${residentContext.context.promptContext}`,
-    `知识库片段：\n${knowledgeResults.data.results.map((item, index) => `[kb-${index + 1}] ${item.title}\n${item.content}`).join("\n\n") || "无"}`,
+    `知识库片段：\n${knowledgeItems.map((item, index) => `[kb-${index + 1}] ${item.title}\n${item.content}`).join("\n\n") || "无"}`,
   ].join("\n\n");
 
   let rawOutput: unknown;
@@ -275,7 +279,15 @@ export async function generateElderAiAnalysis(
     return { success: false, reason: getBriefErrorReason("schema_validation_failed"), status: 502 };
   }
 
-  const normalizedOutput = normalizeCitations(output, citations);
+  const normalizedOutput = normalizeCitations(
+    knowledgeUnavailableReason
+      ? {
+          ...output,
+          dataGaps: [...output.dataGaps, "知识库检索不可用，分析未使用内部知识库"],
+        }
+      : output,
+    citations,
+  );
   const database = getDatabase();
   const rows = await database
     .insert(elderAiAnalyses)