CustomProfile did not override supported_reasoning_efforts, so on the
Responses transport a custom:<name> relay fell through to the OpenAI
per-model ladder (codex_supported_efforts) and a configured effort=max
was silently clamped to xhigh — while the same provider over
chat-completions forwarded max unchanged, because that path already
clamps onto OPENAI_COMPAT_WIRE_EFFORTS.
Declare the same wire set from the profile so the two transports agree:
max survives, ultra still clamps down to max, and the official OpenAI
backend ladder (gpt-5.5 rejecting max) is untouched.
Fixes#114249
f111297af1