Rewrite README to reflect the actual pipeline (frame -> health check
-> SHA-256 -> HMAC-DRBG -> emit), document all entropy.py flags, the
HTTP service endpoints and env vars, container build/run, Kubernetes
notes, and the remote-consumption rngd flow. Fix the notes.md typos
and align its commands with the new --out flag.
Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>
Radek