MINOR, not a patch: existing datadir+key deployments start sending usage
telemetry they were not sending on 1.2.0. That is a visible behavior addition
for customers, so it gets its own minor and a CHANGELOG callout at the top of
the entry rather than shipping silently (Jeff's call, 2026-08-12 walkthrough).

CHANGELOG 1.3.0 - 2026-08-18; VERSION 1.2.0 -> 1.3.0.
README datadir section corrected: it claimed the mode "performs no network I/O"
unconditionally, which is now only true for the keyless case; documents the
key-presence gate and how to run datadir + key with telemetry off.
Gemfile.lock unchanged (Gemfile has no gemspec directive; quonfig not in lock —
verified with bundle install --local).
Full suite green (662 tests, 0 failures); rubocop clean (132 files).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>