refactor: integrate kb-deep-analyzer as kb_workflow.deep_analyzer package

- Move kb-deep-analyzer/deep_analyzer.py to kb_workflow/deep_analyzer/__init__.py
- Update analyze.py to import from kb_workflow.deep_analyzer directly
- Remove sys.path manipulation for external package
- DeepAnalyzer, SimpleAIClient, generate_frontmatter now available as:
  from kb_workflow.deep_analyzer import DeepAnalyzer, SimpleAIClient, generate_frontmatter

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

kb_workflow/pipeline/processors/analyze.py

@@ -9,7 +9,6 @@ from __future__ import annotations
 import json
 import logging
 import os
-import sys
 from pathlib import Path
 from typing import Optional, Dict, Any
 
@@ -17,12 +16,10 @@ from kb_workflow.pipeline.config import get_settings
 from kb_workflow.pipeline.schemas import AnalyzeInput, AnalyzeOutput
 from kb_workflow.pipeline.state import WorkflowStateManager
 from kb_workflow.pipeline.processors.base import BaseProcessor
+from kb_workflow.deep_analyzer import DeepAnalyzer, SimpleAIClient, generate_frontmatter
 
 logger = logging.getLogger(__name__)
 
-# Flag to ensure sys.path is only modified once for kb-deep-analyzer
-_deep_analyzer_path_added = False
-
 
 class AnalyzeProcessor(BaseProcessor):
     """Analyze 处理器 - AI 深度内容分析
@@ -199,16 +196,6 @@ class AnalyzeProcessor(BaseProcessor):
         Returns:
             AnalysisResult 对象
         """
-        # Lazy import with delayed sys.path modification for external kb-deep-analyzer
-        global _deep_analyzer_path_added
-        if not _deep_analyzer_path_added:
-            _kb_deep_analyzer_path = Path(__file__).parent.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))
-            _deep_analyzer_path_added = True
-
-        from deep_analyzer import DeepAnalyzer, SimpleAIClient
-
         # 初始化 AI 客户端
         ai_client = self._create_ai_client()
 
@@ -224,8 +211,6 @@ class AnalyzeProcessor(BaseProcessor):
         Returns:
             SimpleAIClient 实例
         """
-        from deep_analyzer import SimpleAIClient
-
         # 从环境变量获取配置
         api_key = os.environ.get("AI_API_KEY", "")
         provider = os.environ.get("AI_PROVIDER", "")
@@ -307,8 +292,6 @@ class AnalyzeProcessor(BaseProcessor):
             result: AnalysisResult 对象
             content_type: 内容类型
         """
-        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)