refactor(06-03): move sys.path manipulation to lazy import in analyze.py

- Remove top-level sys.path.insert for kb-deep-analyzer
- Add module-level flag _deep_analyzer_path_added for single execution
- Move sys.path manipulation inside _run_analysis method
- External dependency import now happens lazily at runtime

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

kb_workflow/pipeline/processors/analyze.py

@@ -13,11 +13,6 @@ 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 kb_workflow.pipeline.config import get_settings
 from kb_workflow.pipeline.schemas import AnalyzeInput, AnalyzeOutput
 from kb_workflow.pipeline.state import WorkflowStateManager
@@ -25,6 +20,9 @@ from kb_workflow.pipeline.processors.base import BaseProcessor
 
 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
@@ -201,7 +199,14 @@ class AnalyzeProcessor(BaseProcessor):
         Returns:
             AnalysisResult 对象
         """
-        # Lazy import to avoid dependency issues
+        # 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 / "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