feat(06-02): move processors and platforms to kb_workflow.pipeline

- Move all processor implementations (parse, download, asr, analyze, archive)
- Move all platform adapters (base, bilibili, zhihu)
- Update all internal imports to use kb_workflow.pipeline prefix

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

kb_workflow/pipeline/processors/__init__.py

@@ -0,0 +1,26 @@
+"""Processors module for KB Pipeline
+
+This module contains processors for various content transformation tasks:
+- BaseProcessor: Abstract base class for all processors
+- ParseProcessor: URL parsing for various platforms
+- DownloadProcessor: Metadata and content downloading
+- ASRProcessor: Audio-to-text conversion (subtitle download + Whisper.cpp)
+- AnalyzeProcessor: AI-powered content analysis using DeepAnalyzer
+- ArchiveProcessor: Copy analysis reports to archive directory
+"""
+
+from kb_workflow.pipeline.processors.base import BaseProcessor
+from kb_workflow.pipeline.processors.parse import ParseProcessor
+from kb_workflow.pipeline.processors.download import DownloadProcessor
+from kb_workflow.pipeline.processors.asr import ASRProcessor
+from kb_workflow.pipeline.processors.analyze import AnalyzeProcessor
+from kb_workflow.pipeline.processors.archive import ArchiveProcessor
+
+__all__ = [
+    "BaseProcessor",
+    "ParseProcessor",
+    "DownloadProcessor",
+    "ASRProcessor",
+    "AnalyzeProcessor",
+    "ArchiveProcessor",
+]