cleanup: remove dead code and duplicate docs

- Remove session-ses_2f27.md (161KB raw session log)
- Remove 49 ROOT_* duplicate files across REFERENCE/
- Remove 14 duplicate files between REFERENCE/ root and history/
- Remove asr_legacy.rs (dead code, replaced by asr.rs)
- Remove src/core/worker/ (duplicate JobWorker)
- Remove src/core/layers/ (empty directory)
- Remove 4 .bak files in src/
- Remove 7 dead private methods in worker/processor.rs
- Remove backup directory from git tracking

scripts/check_architecture_all.py

@@ -67,10 +67,10 @@ def main():
 
     all_passed = doc_check_success and code_doc_check_success
     if all_passed:
-        print(f"\n🎉 所有檢查通過！")
+        print("\n🎉 所有檢查通過！")
         print("架構文檔符合 Phase 1 標準化要求。")
     else:
-        print(f"\n⚠️  發現問題，請參考檢查結果進行修復。")
+        print("\n⚠️  發現問題，請參考檢查結果進行修復。")
         print("提示：")
         print("  1. 使用 TERMINOLOGY_MAPPING.md 作為術語標準參考")
         print("  2. 確保設計與實現差異在 DESIGN_IMPLEMENTATION_GAP.md 中記錄")