Add health.py with monobit, runs, and long-run tests (FIPS 140-2 Annex C
thresholds for a 20000-bit sample). Wire into entropy.py so raw JPEG
bytes are tested before hashing; a frozen or degraded camera frame is
rejected and not used to seed the DRBG. Runs thresholds are doubled
because we count 0-runs and 1-runs together. Add --no-health to disable.
Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>
