Bump TanStack DB peer to 0.9 and record the publish recipe

[InfinityBowman]

• @cf-sync/client 0.3.1: peer @tanstack/db widened to ^0.8.0 || ^0.9.0, @tanstack/react-db to ^0.3.0 || ^0.4.0; dev dependency and the demo move to the 0.9.0 / 0.3.8 pair. TanStack DB 0.9.0 contains fix: harden subset loading, recovery, and live-query value semantics TanStack/db#1797, the upstream fix for the congruence race corates patched around on 0.8.7 (corates issue #675).
• CLAUDE.md gains a Releasing section with the actual publish command.

Verified: typecheck on all packages, full test suite (protocol 57, server 141, yjs 43, client 152), and pnpm check:packages.

Summary by CodeRabbit

• New Releases

  • Released the client package version 0.3.1.

• Compatibility

  • Expanded compatibility with newer versions of TanStack DB and React DB.
  • Updated the demo application to use the latest TanStack React DB release.

• Documentation

  • Added publishing and release workflow guidance for maintainers.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

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Plan: Advanced

Run ID: 3234d8e2-69b9-46c0-b6c0-6b566548dcea

📥 Commits

Reviewing files that changed from the base of the PR and between 129c1fc and 02accc8.

⛔ Files ignored due to path filters (1)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml

📒 Files selected for processing (3)

• CLAUDE.md
• apps/demo/package.json
• packages/client/package.json

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📜 Recent review details

⏰ Context from checks skipped due to timeout. (1)

• GitHub Check: ci

🧰 Additional context used

🧠 Learnings (1)

📓 Common learnings

Learnt from: CR
Repo: InfinityBowman/cf-sync

Timestamp: 2026-09-15T23:14:08.707Z
Learning: pnpm build

Learnt from: CR
Repo: InfinityBowman/cf-sync

Timestamp: 2026-09-15T23:14:08.707Z
Learning: `prepack` only syncs docs, so run `pnpm build` first

🪛 LanguageTool

CLAUDE.md

[grammar] ~35-~35: Ensure spelling is correct
Context: ...indow unless they exclude @cf-sync/* (corates does).

(QB_NEW_EN_ORTHOGRAPHY_ERROR_IDS_1)

🔇 Additional comments (3)

packages/client/package.json (1)

3-3: LGTM!

Also applies to: 57-58, 71-71

apps/demo/package.json (1)

18-18: LGTM!

CLAUDE.md (1)

25-35: LGTM!

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📝 Walkthrough

Walkthrough

The change prepares the client package for release 0.3.1, widens TanStack peer compatibility, updates the demo dependency, and documents the package publishing workflow.

Changes

Release preparation

Layer / File(s)	Summary
Package versions and compatibility packages/client/package.json, apps/demo/package.json	The client package version changes to 0.3.1. TanStack peer ranges and the development dependency are updated. The demo dependency changes to ^0.3.8.
Release workflow documentation CLAUDE.md	The new Releasing section documents version updates, authentication, building, publishing, demo deployment, and pnpm release behavior.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 02acc

This release metadata and documented workflow introduce no established merge-blocking risk.

🚥 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 clearly summarizes the two main changes: widening TanStack DB peer support to version 0.9 and documenting the publish recipe.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
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 chore/tanstack-db-0.9.0

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