feat(fiber): upgrade FNN integration to the final 0.9.0 release

[humble-little-bear]

Summary

Adapt offckb's Fiber (FNN) support from the 0.9.0-rc7 pre-release to the final FNN v0.9.0 release (per [RET-350]).

What changed

• Version pins — SUPPORTED_FNN_VERSIONS / DEFAULT_FNN_VERSION now target 0.9.0; src/cfg/setting.ts default bumped from 0.9.0-rc7 to 0.9.0.
• Download checksums — the pinned SHA-256 digests were re-derived from the v0.9.0 release tarballs (they necessarily changed from rc7).
• ckb/fiber submodule — re-pinned to the v0.9.0 tag commit e6cb7ac (was bc361aa/rc7).
• Docs — README and Makefile version/commit references updated; a changeset records the release note.
• Tests — fiber-install.test.ts package-name assertions moved from 0.9.0-rc7 to 0.9.0.

Why nothing else needed to change

I diffed the 0.9.0-rc7 → v0.9.0 transition on the upstream repo:

• The Fiber contracts (auth, funding_lock, commitment_lock) are byte-identical between rc7 and v0.9.0.
• The config/testnet/config.yml template offckb uses for its devnet is byte-identical — already matches offckb's bundled ckb/devnet/specs/fiber/testnet-config.yml.
• The RPC surface offckb calls (node_info, connect_peer, list_peers) and the CLI flags it uses (-c, -d, -s, --rpc-enabled-modules, --version) are unchanged in v0.9.0.

Verified the 0.9.0 binary directly: fnn --version prints 0.9.0, which the existing getVersionFromBinary regex matches, and the package layout matches the installer's expectations.

Validation

• npx jest tests/fiber-* — 9 suites / 91 tests pass.
• npx tsc --noEmit — clean.
• npx eslint on changed files — clean.

[coderabbitai]

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ℹ️ Recent review info

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Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 813d8863-77c7-48e5-83c2-979b94056e12

📥 Commits

Reviewing files that changed from the base of the PR and between 79e666b and 7c1618a.

📒 Files selected for processing (7)

• .changeset/fnn-v090-upgrade.md
• Makefile
• README.md
• ckb/fiber
• src/cfg/setting.ts
• src/fiber/install.ts
• tests/fiber-install.test.ts

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📝 Walkthrough

Summary by CodeRabbit

• New Features

  • Updated bundled Fiber support to the stable v0.9.0 release.
  • Fiber installation now uses refreshed, verified platform packages.

• Documentation

  • Updated Fiber version references and release information across user documentation.

• Bug Fixes

  • Improved package version handling for Fiber v0.9.0 across supported platforms.

Walkthrough

The CLI now targets Fiber v0.9.0 instead of release candidate 0.9.0-rc7. It updates package checksums, default settings, the Fiber submodule reference, documentation, package-name tests, and release metadata.

Changes

Fiber v0.9.0 upgrade

Layer / File(s)	Summary
Runtime version and package update src/cfg/setting.ts, src/fiber/install.ts, ckb/fiber	Default and supported FNN versions now use 0.9.0. Trusted package checksums and the Fiber submodule pointer use the final release.
Release validation and provenance tests/fiber-install.test.ts, Makefile, README.md, .changeset/fnn-v090-upgrade.md	Package-name tests, Fiber documentation, provenance metadata, and the changeset identify FNN v0.9.0 and its updated commit.
Estimated code review effort: 2 (Simple)	~10 minutes

Merge Risk: ⚪ Minimal · up to 7c161

This PR updates Fiber support from 0.9.0-rc7 to the final 0.9.0 release, including version pins, checksums, documentation, and tests. No actionable merge-blocking risk remains after normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description check	✅ Passed	The description clearly explains the FNN upgrade, related changes, rationale, and validation results.
Title check	✅ Passed	The title clearly and concisely identifies the upgrade of FNN integration to the final 0.9.0 release.
Docstring Coverage	✅ Passed	Docstring check was indeterminate for this PR — some files could not be analyzed in time. Not blocking.
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.

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