The 2.5-flash-lite model was incorrectly matching the 2.5-flash
case, setting minimal budget to 128. Per Google's docs, flash-lite's
minimum thinking budget is 512, not 128. This caused the error:
The thinking budget 128 is invalid. Please choose a value between
512 and 24576.
Add a dedicated 2.5-flash-lite case before the 2.5-flash case so
the more specific match takes priority.
Fixes#2838
Co-authored-by: JasonOA888 <JasonOA888@users.noreply.github.com>
