NewFromEnv now falls back to DISCOURSE_KEY when DISCOURSE_API_KEY
is unset (the explicit name still wins), matching the shorter
DISCOURSE_URL/DISCOURSE_KEY convention used across the MOPAC fleet
scripts. Behavioral test proves both the alias and the precedence
against the fake server.
Part of Redmine 507 (Discourse Go client).
Covers the MOPAC briefing/report surface (Redmine 495 Part A): category
list/create (create needs the admin-scoped key; current key 403s, typed
as ErrForbidden), topic create/list/latest/get, post create/update/get,
current-user identity probe, and a Do() JSON passthrough so unmodeled
endpoints need no client release. Key is env/constructor-only, never a
flag, never logged; errors classify via errors.Is. Fake-server unit
tests + containerized end-to-end smoke (redaction sweep included); live
reads verified against community.turnsys.com.
💘 Generated with Crush
Assisted-by: Crush:glm-5.2
mrcharles