docs: descriptor v1 changelog + MANUAL/README updates, close out #71

[mobileskyfi]

Summary

Docs-only follow-up to #84 (descriptor v1 implementation). Kept separate so
the code PR stayed focused on implementation review; this one is a fast,
low-stakes prose pass.

• CHANGELOG.md: [Unreleased] entry for the breaking MachineDescriptor
  → Descriptor restructure.
• MANUAL.md / README.md: inspect/descriptor()/env sections
  rewritten for the v1 services shape; note env's removal and the
  subprocessEnv() split.
• BACKLOG.md: drops the #71 anchor entry now that the work has landed.

Closes #71.

Cross-repo heads-up

Per docs/centrs-interface.md's backward-compatibility section, a breaking
MachineDescriptor restructure requires flagging it to any repo that reads
descriptor()/MachineDescriptor today (restraml, donny per #50's
consumer list). I checked both local checkouts directly
(grep -rl "MachineDescriptor\|\.descriptor(" src) — neither repo's own
source actually calls .descriptor() or references MachineDescriptor
today; both only use QuickCHR.start() (unaffected) and
subprocessEnv()-backed env vars (unaffected, untouched by this change).
So this is a low-stakes FYI rather than an active break. I'll file a short
heads-up issue on each repo referencing this change, for the record and in
case future work there adds a descriptor() dependency.

Test plan

• bun run check clean (biome, tsc, markdownlint, cspell, examples,
  shellcheck).
• Confirmed via grep that restraml/donny don't consume the changed
  surface today.
• Reviewer: skim CHANGELOG/MANUAL/README changes for accuracy against
  the merged feat(api): descriptor v1 — structured per-service contract for centrs (#71) #84 shape.

[coderabbitai]

Warning

Review limit reached

@mobileskyfi, you've reached your PR review limit, so we couldn't start this review.

Next review available in: 12 minutes

Enable usage-based reviews in Billing to review now. Otherwise, wait until the next included review is available.
You're only billed for reviews past your plan's rate limits ($0.25/file).

How can I continue?

After more reviews become available, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

To avoid repeated limits, reduce automatic review volume by pausing incremental auto-reviews earlier, using label-based review opt-in, excluding WIP or generated PR titles, or requesting reviews manually when the PR is ready. If your team needs uninterrupted high-volume reviews, an organization admin can enable usage-based reviews.

How do review limits work?

CodeRabbit enforces per-developer PR review limits for each organization. Most developers receive the normal plan review availability.

For paid Pro and Pro+ PR reviews, CodeRabbit uses adaptive limits for sustained high-volume activity. When a developer's recent PR review activity reaches the 95th percentile or higher among CodeRabbit users, additional reviews become available more gradually as earlier reviews age out of the rolling window.

Please refer docs for additional details.

Review details

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: ea82b042-4086-4ffe-9473-9b52b2ed8305

📥 Commits

Reviewing files that changed from the base of the PR and between 0c42c46 and 765ca69.

📒 Files selected for processing (4)

• BACKLOG.md
• CHANGELOG.md
• MANUAL.md
• README.md

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/71-descriptor-v1-followup

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}

[Copilot]

Pull request overview

Docs-only follow-up aligning the public documentation and release notes with the descriptor v1 (Descriptor, descriptorVersion: 1) contract introduced in #84, and removing the now-completed #71 backlog anchor.

Changes:

• Add an [Unreleased] CHANGELOG entry documenting the breaking MachineDescriptor → Descriptor restructure and env removal from the descriptor.
• Rewrite README/MANUAL sections describing quickchr inspect, descriptor(), and env to match the v1 services-map shape and the subprocessEnv() split.
• Remove the #71 “grounding anchor” entry from BACKLOG.md now that the work has landed.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
README.md	Updates the inspect/env documentation to describe descriptor v1 and the removal of env from the descriptor.
MANUAL.md	Updates CLI command docs and the ChrInstance interface excerpt to reflect Descriptor and v1 semantics.
CHANGELOG.md	Adds an Unreleased breaking-change entry describing the descriptor v1 restructure and env behavior change.
BACKLOG.md	Removes the #71 anchor entry.