Targets 55b74275 (#11 and #17 in main; #15 docs only). #11 signs everyone out
once. Lists the validator's required keys by name, NetworkTagSecret (32+
chars) as a hard startup failure, put into step 3. Rehearsal through
sudo -u postgres and one start on a separate env file, scratch connection
string, throwaway KeysPath and a port other than 5080; no dotnet ef. Backs up
the data-protection key ring. Uses the real log files with a baseline count.
Notes bifrost-watchdog-notice.timer.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>