fix(admin): Fix Prompt management list not showing version info and add debug diagnostics

Summary:
- Fix Prompt list API response schema missing activeVersion and draftVersion fields
- Fastify was filtering out undefined schema fields, causing version columns to show empty
- Add detailed diagnostic logging for Prompt debug mode troubleshooting
- Verify debug mode works correctly (DRAFT version is used when debug enabled)

Changes:
- backend/src/common/prompt/prompt.routes.ts: Add activeVersion and draftVersion to response schema
- backend/src/common/prompt/prompt.service.ts: Add diagnostic logs for setDebugMode and get methods
- PKB module: Various authentication and document handling fixes from previous session

Tested: Debug mode verified working - v2 DRAFT version correctly loaded when debug enabled

frontend-v2/src/modules/pkb/components/Workspace/DeepReadMode.tsx

@@ -7,6 +7,7 @@ import React, { useMemo } from 'react';
 import { FileText, BookOpen, ExternalLink } from 'lucide-react';
 import { ChatContainer } from '@/shared/components/Chat';
 import type { KnowledgeBase, Document } from '../../api/knowledgeBaseApi';
+import { getAccessToken } from '../../../../framework/auth/api';
 
 interface DeepReadModeProps {
   kbId: string;
@@ -144,16 +145,18 @@ export const DeepReadMode: React.FC<DeepReadModeProps> = ({
             timestamp: Date.now(),
           }]}
           providerConfig={{
-            apiEndpoint: '/api/v1/chat/stream',
+            apiEndpoint: '/api/v2/pkb/chat/stream',
             requestFn: async (message: string) => {
               // 🔑 关键：传递 fullTextDocumentIds 而不是 documentIds
               // fullTextDocumentIds 会触发全文加载模式，AI可以看到完整文献
               // documentIds 只是过滤RAG检索结果，AI只能看到片段
-              const response = await fetch('/api/v1/chat/stream', {
+              const token = getAccessToken();
+              const response = await fetch('/api/v2/pkb/chat/stream', {
                 method: 'POST',
                 headers: { 
                   'Content-Type': 'application/json',
                   'Accept': 'text/event-stream',
+                  ...(token ? { 'Authorization': `Bearer ${token}` } : {}),
                 },
                 body: JSON.stringify({
                   content: message,