zagent 0.0.236

• zagent onboard no longer stalls through the whole live smoke turn on a
  bad credential (flock finding 2026-09-17): a classified Coding Plan
  credential probe now runs between the doctor checks and the smoke turn —
  a rejected or missing key fails in about a second with the sign-in
  guidance instead of tens of seconds ending in an opaque
  Turn execution failed, and a provider-reported exhausted window
  (business codes 1308/1113) fails fast with the reset pointer. An
  OAuth-signed-in user, a bare monitor rate-limit, or a transport flap stay
  inconclusive and still run the real smoke turn. The flock card pool gains
  onboard-bad-key-fast-fail.