fix(2): discourse — mint_admin ruby PATH (bash -c + discover) + BACKUP_VERIFY for post-upgrade backup race

tests/discourse/functional/_discourse.py

@@ -40,11 +40,16 @@ _BOOTSTRAP_RB = (
 
 def mint_admin(domain: str) -> tuple[str, str]:
     """Bootstrap an admin + fresh API key via Rails in the app container. Returns (api_key, username)."""
+    # `bin/rails` is `#!/usr/bin/env ruby`; the bitnami discourse image keeps ruby at
+    # /opt/bitnami/ruby/bin, which is NOT on a login shell's PATH (`bash -lc` resets PATH from
+    # /etc/profile → `env: 'ruby': No such file or directory`, rc=127). Use a non-login shell, discover
+    # ruby (image-ENV PATH first, bitnami fallback), and invoke it explicitly so the shebang is moot.
     cmd = (
         "cd /opt/bitnami/discourse && "
-        f"RAILS_ENV=production bin/rails runner \"{_BOOTSTRAP_RB}\""
+        "RUBY=$(command -v ruby || echo /opt/bitnami/ruby/bin/ruby) && "
+        f"RAILS_ENV=production \"$RUBY\" bin/rails runner \"{_BOOTSTRAP_RB}\""
     )
-    out = lifecycle.exec_in_app(domain, ["bash", "-lc", cmd], service="app", timeout=240)
+    out = lifecycle.exec_in_app(domain, ["bash", "-c", cmd], service="app", timeout=240)
     key = user = None
     for line in out.splitlines():
         line = line.strip()