v0.2.0: Native Rust Gateway & Observability

What's Changed in v0.2.0

AetherRelay has been fully rewritten in native Rust (Axum 0.8 + Tokio 1.x) with embedded SQLite WAL storage, providing a lightweight, crash-resilient buffer for incoming webhooks.

Key Features

• Zero-Copy Ingest: Accepts payloads immediately with HTTP 202 Accepted while preserving raw request bytes for cryptographic verification.
• Constant-Time Crypto Adapters: Multi-provider support for GitHub (HMAC-SHA256), Stripe (v1 timestamped with replay window), Midtrans (SHA-512), Discord (Ed25519), and Generic HMAC.
• Atomic Deduplication: Events are deduplicated on ingest using SQLite compare-and-swap transactions on (endpoint_id, idempotency_key).
• Reliable Dispatch Loop: Asynchronous background worker using AWS decorrelated jitter exponential backoff, per-endpoint circuit breaker, and dead-letter queue (DLQ) with replay API.
• Prometheus Observability: Structured JSON logging, /health check, and Prometheus /metrics endpoint with counters, histograms, and dispatch gauges.
• Minimal Footprint: Static musl binary (~10.6 MB) and unprivileged scratch Docker image (~9.7 MB) with < 15 MB RAM usage under load and ~10 ms cold start.