v0.4.2

Improvements:

• Allow max_trailing_silence to exceed max_silence: after the event
  boundary is decided (at max_silence), additional silent frames are
  collected past the boundary up to max_trailing_silence. Collection stops
  as soon as a new valid frame is detected, so separate events are not merged.
  This lets you use a small max_silence for tight event boundaries while
  keeping enough trailing audio to preserve natural fadeouts. The same option
  is exposed on the CLI as -g/--max-trailing-silence.

Bug fixes:

• Fix 1-frame gap in leading silence between consecutive events. The silent
  frame that triggered the transition into SILENCE was previously dropped
  instead of being seeded into the leading buffer for the next token, causing
  an unavoidable 1-frame gap regardless of max_leading_silence. Trailing
  frames trimmed by max_trailing_silence are now also seeded into the
  leading buffer of the next token.