restore: 恢复误删的技能目录并修复导入方式

- 恢复 kb-zhihu-metadata, kb-bilibili-metadata, kb-deep-analyzer
- 修改 zhihu.py 和 analyze.py 使用 sys.path 方式导入
- 删除符号链接 kb_zhihu_metadata

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

kb_pipeline/processors/analyze.py

@@ -9,9 +9,15 @@ from __future__ import annotations
 import json
 import logging
 import os
+import sys
 from pathlib import Path
 from typing import Optional, Dict, Any
 
+# Add kb-deep-analyzer to path for import
+_kb_deep_analyzer_path = Path(__file__).parent.parent.parent / "kb-deep-analyzer"
+if str(_kb_deep_analyzer_path) not in sys.path:
+    sys.path.insert(0, str(_kb_deep_analyzer_path))
+
 from ..config import get_settings
 from ..schemas import AnalyzeInput, AnalyzeOutput
 from ..state import WorkflowStateManager
@@ -194,7 +200,7 @@ class AnalyzeProcessor(BaseProcessor):
             AnalysisResult 对象
         """
         # Lazy import to avoid dependency issues
-        from kb_deep_analyzer.deep_analyzer import DeepAnalyzer, SimpleAIClient
+        from deep_analyzer import DeepAnalyzer, SimpleAIClient
 
         # 初始化 AI 客户端
         ai_client = self._create_ai_client()
@@ -211,7 +217,7 @@ class AnalyzeProcessor(BaseProcessor):
         Returns:
             SimpleAIClient 实例
         """
-        from kb_deep_analyzer.deep_analyzer import SimpleAIClient
+        from deep_analyzer import SimpleAIClient
 
         # 从环境变量获取配置
         api_key = os.environ.get("AI_API_KEY", "")
@@ -263,7 +269,7 @@ class AnalyzeProcessor(BaseProcessor):
             result: AnalysisResult 对象
             content_type: 内容类型
         """
-        from kb_deep_analyzer.deep_analyzer import generate_frontmatter
+        from deep_analyzer import generate_frontmatter
 
         # 标准化元数据（扁平化嵌套结构）
         normalized_metadata = self._normalize_metadata(metadata)