The CLI now covers the whole Redmine 507 surface: `search TERM
[-page N]` (operators pass through quoted), `messages send -title
-to user1,user2 [-group/-email] [-file|-raw]`, plus the two secret
helpers `webhook verify SIG` (delivery body on stdin, exit 0 only
on a valid HMAC) and `sso verify SSO SIG` (prints the decoded
Discourse Connect payload as JSON). The helpers run before client
construction so they work with only their secret env set, no
instance credentials needed. Usage text lists the new env vars.
Part of Redmine 507 (Discourse Go client).
mrcharles
f13302778b