Refactor to use p-ratelimit instead of custom implementation
- Replace custom RateLimiter with p-ratelimit library
- Configure: 3000 requests per 5min, 48 concurrency, 60s max delay
- Wrap API calls with p-ratelimit + retry logic
- All tests passing
Uses existing dependency instead of reinventing the wheel.
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Co-Authored-By: Claude <noreply@anthropic.com>