Stale cached or dynamically discovered MiniMax M2 / GPT-OSS rows can carry
explicit pre-fix thinking.efforts with minimal/xhigh. buildModel used to
trust that explicit surface and only backfill wire maps, so those rows could
still make disableReasoning choose minimal and hit Fireworks' none mapping.
Normalize model-defined effort restrictions before returning explicit
thinking metadata, and drop stale effortMap entries that no longer apply to
the normalized effort surface.
Fixes#2315
roboomp
efd0812791