STEP_034E4B_WG_CLIENT_ENDPOINT_SOURCE_FIX BLOCK_OLD_SOURCE_REMAINS
timestamp: 20260708-115314

Final WG Paid endpoint:
- wg-studio.secret-studio.ru:51830

Validation:
- changed_source_files: 1
- final_source_endpoint_lines: 1
- old_source_endpoint_remaining_lines: 4
- running_backend_old_endpoint_lines: 1
- running_backend_final_endpoint_lines: 0
- backend_health_ok_lines: 2
- no_docker_restart_lines: 1
- no_wg_reload_lines: 1
- no_peer_create_lines: 1

Changes:
- VM121 WG Access source/env files only
- no restart yet

Important:
- running backend env may still show old WG_CLIENT_ENDPOINT until controlled backend restart/recreate.

Next:
- controlled backend restart/recreate, then verify running env and generated test config endpoint.
