v3.0.0

Major Changes

• 8c0d28b: Implement fetch library in Python, Rust, and Go
  • Python: httpx-based async client with custom circuit breaker, sliding window rate limiter, retry with Retry-After, pydantic schema validation, builder pattern (105 tests)
  • Rust: reqwest-based async client with custom circuit breaker, sliding window rate limiter, retry with exponential backoff + jitter, thiserror errors, builder pattern (94 tests)
  • Go: net/http client with sony/gobreaker circuit breaker, sliding window rate limiter, retry with Retry-After, builder pattern (76 tests)