Feature enhancement: Remind the sysop when registration requests are over 1 day old. (1.0.11)

[n9jr]

Enabling user automaton to register users is one thing. Getting the sysop to respond is another. Can a nagware timer be added so registration requests made over 1 day ago the sysop gets a notification that registration requests are pending.

[AI3I]

Implemented locally for 1.0.11. The SysOp registration queue API now returns stale request metadata for pending requests older than 24 hours, the Requests table highlights stale rows, and a visible warning summarizes stale count/oldest pending age. Added regression coverage in tests/test_web_admin.py. Validation: pytest tests/test_public_web.py tests/test_telnet_commands.py tests/test_web_admin.py tests/test_transports.py tests/test_app_ingest.py (443 passed).