GitLab

docs: fix final-review findings from audit-remediation (F5 client_id, F7 lifetime, F1/F5 changelog wording)

Six documentation/comment-only corrections found in the last review pass
of the 2026-08 audit remediation:

- ChannelStatus.lifetime comment: a bare poll does NOT extend lifetime
  (audit F7, live-verified); only a command carrying a LIFETIME tag does.
- Onboarding snippets in README.md, docs/GETTING_STARTED.md,
  docs/RECIPES.md, and two control.py docstring examples now pass
  client_id=... so they don't raise under the 3.22.0 F5 change (create
  with neither client_id nor destination -> ValidationError).
- control.py client_id docstring: the silent fall-through-to-radiod
  behavior persisted through 3.21.1, not just "before 3.15"; the raise
  lands in 3.22.0.
- CHANGELOG.md: exact set_spectrum() parameter names
  (window_type/avg/overlap/base/step/demod_type/frequency_hz); F1 was
  an origin bug (fields never stored), not a regression; F5 reworded to
  say radiod created no channel at all, plus a note on the deliberate
  SSRC-hash consequence for the client_id-only auto-SSRC create path.
- spectrum_stream.py SpectrumStream docstring: overlap is [0.0, 1.0)
  and averaging must be >= 1, both enforced by delegated validation in
  RadiodControl.set_spectrum(), raising ValidationError rather than
  being sent to radiod as a raw float.

No behavior changes; docs/comments only.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>