v1.0.0

First stable release of the ETA serving service. It serves POST /predict with strict input validation, runs an optional shadow version on every request and reports divergence, and swaps model versions atomically so that in-flight requests finish on the model they started with. Prometheus metrics and a provisioned Grafana dashboard cover traffic, latency, rejections, shadow divergence, swaps, and drops; the load test promotes v2 mid-run with 0 dropped requests.