Adds cli/tests/blossom/blossom-live.sh, an end-to-end harness that drives the
full amy blossom lifecycle against a REAL public Blossom server: upload → HEAD
check → download-and-verify-hash → list → cross-server mirror → delete. Verified
green (6/6) against files.sovbit.host with a mirror to blossom.primal.net, which
exercises the whole quartz/commons/CLI Blossom stack over the wire.
Server-side write rejections (whitelists, rate limits, payment) record as SKIP,
not FAIL — only a broken client contract (bad descriptor, hash mismatch,
unparseable list) fails — since public servers gate anonymous writes very
differently. Documented in cli/tests/README.md; state dir gitignored.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ckbnz1N94W1hnNC9xpsCNP
