native-v0.5.5

The 100% that wasn't (#70)

The cold-run test found the bar at 100% with no Try It button. The download
had finished — WhisperKit then compiles and specializes the model for the
chip, minutes on a first Large-turbo run, reporting no progress at all.

Now the transfer owns 0-90%, the compile creeps asymptotically through the
90s (never arriving on its own, however long it takes), the caption reads
"Downloaded — now optimizing for your Mac. First run only.", and 100% is
reserved for the moment Try It appears. Footer status mirrors the card so
the two can't disagree again.

Also ships the adaptive RECOMMENDED chip (#68). 0.5.5, build 10.