docs: link the three surface scaffolds

[asafgolombek]

Follow-up to #7.

nimbus-raycast and nimbus-statuspage were private when ECOSYSTEM.md was written, so the surfaces table listed them as plain text rather than emitting links most readers would 404 on. Both are public now, and nimbus-postmortem has been created — it was named in the retired ecosystem roadmap and handed off to "its own repo's ROADMAP.md", except the repository did not exist.

All three are labelled (scaffold): they hold a vision README and a build prompt, no implementation. Their own READMEs say the same, so the table does not overstate what ships.

Also adds a line making the boundary explicit — this document says what exists; the gateway's roadmap says what happens next. That is the ownership split .github#7 established, and the scaffolds are the first case where it matters.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Added the scaffolded Nimbus postmortem surface to the ecosystem overview.
  • Clarified that scaffolded surfaces include planning materials only and are not yet implemented.
  • Noted that these surfaces are sequenced in the gateway roadmap.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 70f6cb28-098e-498a-93e7-46ad0f88d1b1

📥 Commits

Reviewing files that changed from the base of the PR and between 2895990 and 348325b.

📒 Files selected for processing (1)

• ECOSYSTEM.md

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📝 Walkthrough

Walkthrough

The ecosystem documentation adds the scaffolded nimbus-postmortem surface and explains that scaffold entries contain a vision README and build prompt, with implementation sequenced through the gateway roadmap.

Changes

Surface documentation

Layer / File(s)	Summary
Surface inventory and scaffold guidance ECOSYSTEM.md	Adds the nimbus-postmortem surface and clarifies the meaning and roadmap status of scaffolded surfaces.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects the doc update linking the three scaffolded surfaces.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch dev/asafgolombek/link-surface-repos

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

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud