Two halves close the 'legacy pythonw gateways survive updates forever' gap:
1. hermes update now regenerates the installed Scheduled Task / Startup
launcher scripts (gateway.cmd + gateway.vbs) during the gateway resume
phase. They are persistence artifacts written once at install time;
updates never touched them, so pre-aa2ae36c3f installs kept launching
the gateway through pythonw.exe forever — every descendant spawn
flashed a conhost (#54220/#56747) and, since #70344, the console-less
gateway died at startup with RuntimeError: sys.stderr is None (#71671).
The task /TR points at a stable script path, so rewriting the files
retargets it with no schtasks call and no UAC. No-op for modern
installs; best-effort so a failed refresh never fails the update.
2. _resolve_detached_python() normalizes a legacy pythonw.exe interpreter
to its sibling console python.exe when it exists, so the update
pause/resume argv-replay path (and any other caller handed a legacy
command line) respawns on the current design instead of faithfully
resurrecting the old one. Keeps pythonw when no sibling exists — a
failed respawn is worse than a console-less gateway.
