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/update_all_demographics.py

@@ -8,7 +8,6 @@ import os
 import cv2
 import psycopg2
 import insightface
-import numpy as np
 
 # Configuration
 DB_CONFIG = {"host": "localhost", "user": "accusys", "dbname": "momentry"}
@@ -89,9 +88,9 @@ def process_person(app, conn, person_id, video_uuid, timestamp):
             print(f"  -> Detected: Age {age}, Gender {gender}")
             update_db(conn, person_id, age, gender)
         else:
-            print(f"  -> Face found but attributes missing.")
+            print("  -> Face found but attributes missing.")
     else:
-        print(f"  -> No face detected in frame.")
+        print("  -> No face detected in frame.")
 
 
 def main():