v0.4.0

Minor Changes

• ccc4f4e: Give every language the same emit posture: retry with backoff, and never fail
  silently.
  • Retry on transient failure in Python, Rust, Go, and .NET — previously
    TypeScript only. Transport errors and HTTP 5xx are retried with exponential
    backoff; a 4xx is surfaced immediately. The retried POST carries the same
    canonical bytes, since ingest dedupes on the event hash. The defaults now live
    in spec/parity-corpus.json's retryPolicy (3 attempts, 100 ms base,
    doubling) and every language's tests assert their client against it, rather
    than five copies of the same magic numbers.
  • BREAKING (Python): swallow_errors now defaults to False. It defaulted
    to True, so a misconfigured endpoint or an expired token dropped every audit
    event and reported success — fail-open on the exact path that carries the
    record. Pass swallow_errors=True to keep the old behaviour; on_error now
    fires whether or not the error is swallowed. (The old docstring also claimed
    this matched the TypeScript client. It never did — TS has always thrown.)
  • New: AuditClient.emit_async in Python, running the blocking urllib
    POST off the event loop via asyncio.to_thread.
  • Rust's AuditClientOptions gains max_retries / retry_backoff_ms (both
    Option, None = the shared default) and an AuditClientOptions::new
    constructor. Go's AuditClient gains MaxRetries / RetryBackoff (zero =
    default). .NET's AuditClientOptions gains MaxRetries / RetryBackoffMs.
  • Go's Emit stays synchronous on purpose — go client.Emit(ctx, event) is how
    Go does async — and now honours context cancellation between retries too.