Configures Toxiproxy for TCP-level fault injection - runs as a sidecar / proxy between client and upstream, applies toxics (latency, bandwidth, slow_close, timeout, slicer, limit_data, reset_peer) via control API. Focused on the proxy itself rather than an API-level chaos runner, including non-test usage (chaos in dev environments, integration tests, pre-prod simulation). Use when the team needs TCP-precise fault injection in development / integration environments without K8s or commercial tooling.