Remote bridge now tells sign-out and refused credential refreshes apart from ordinary dropped connections.
What's wrong with this entry?
When a remote bridge session loses its credentials, it now distinguishes the host declining to refresh them, a sign-out on this machine, and a 403 refusal, instead of lumping all three in with a generic transport close.
- A machine-level sign-out stops the session and prints "Signed out on this machine ... — stopping".
- A 403 close goes through its own handler with its own recovery path.
bridge_repl_v2_signed_out
Strings lifted out of the shipped bundle, so the claim above can be checked against them.