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⚡ Bolt: Optimize TokenBucketLimiter refill#7

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bolt-optimize-refill-635821146897076969
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⚡ Bolt: Optimize TokenBucketLimiter refill#7
google-labs-jules[bot] wants to merge 1 commit into
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bolt-optimize-refill-635821146897076969

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Optimize the refill method in TokenBucketLimiter to reduce garbage collection pressure by removing lambda allocations and to prevent integer overflow during token calculations. Verified with existing tests and confirmed thread safety.


PR created automatically by Jules for task 635821146897076969 started by @SpaceLeam

- Replace `AtomicInteger.updateAndGet` with manual `compareAndSet` loop to avoid lambda allocation in hot path.
- Add overflow protection for `periodsElapsed * refillTokens` calculation.
- Optimize calculation to skip multiplication when bucket is obviously full.
- Use `long` arithmetic for token addition to prevent integer overflow before clamping.

⚡ Bolt: Reduces GC pressure and improves numeric safety.
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