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/final_face_validation.py

@@ -7,7 +7,6 @@
 import sys
 import os
 import subprocess
-import time
 
 
 def run_test(script_name, description):
@@ -50,7 +49,7 @@ def check_server_status():
 
         response = requests.get("http://localhost:3002/health", timeout=5)
         if response.status_code == 200:
-            print(f"✅ 生產服務器運行正常 (端口 3002)")
+            print("✅ 生產服務器運行正常 (端口 3002)")
             return True
         else:
             print(f"❌ 生產服務器異常: {response.status_code}")
@@ -63,7 +62,7 @@ def check_server_status():
 
         response = requests.get("http://localhost:3003/health", timeout=5)
         if response.status_code == 200:
-            print(f"✅ 開發服務器運行正常 (端口 3003)")
+            print("✅ 開發服務器運行正常 (端口 3003)")
             return True
         else:
             print(f"❌ 開發服務器異常: {response.status_code}")
@@ -100,7 +99,7 @@ def check_database():
         """)
 
         tables = cursor.fetchall()
-        print(f"✅ 數據庫連接正常")
+        print("✅ 數據庫連接正常")
         print(f"✅ 找到 {len(tables)} 個人臉相關表:")
         for table in tables:
             print(f"  - {table[0]}")