BFEv1.8.8.2

BFE v1.8.8.2

Fixed (issue #1401):

• parse the final usage embedded in the streaming finish chunk's choice
  (choices[N].usage, cache field cached_tokens) used by kimi-for-coding
  and other upstreams ignoring the injected stream_options.include_usage
• default EstimateToken/InjectStreamUsage as program defaults so the
  fixes survive binary upgrades without new conf keys
• clamp the negative completion-tokens sentinel at the access log
  boundary (no more negative output token counts)

Based on bfenetworks/bfe v1.8.8.