chore: prep v1.2.0

[tac0turtle]

Stamps the [Unreleased] changelog section as v1.2.0 — the CHANGELOG equivalent of the prior chore: prep ... release commits.

Why a minor bump (1.1.x → 1.2.0)

• Breaking core Executor change: ExecuteTxs now returns an ExecuteResult struct (carrying NextProposerAddress) instead of updatedStateRoot []byte (#3282). core must be re-released (planned core/v1.1.0) before ev-node/apps can bump.
• Proposer key rotation: state tracks NextProposerAddress and signed headers now validate signer identity — a breaking state/consensus change (#3282).

Changelog changes

The [Unreleased] section was missing the two largest features on main. Added:

• Added: proposer key rotation (#3282), Amsterdam fork prep / reth 2.3 (#3352)
• Fixed: non-aggregator readiness (#3376), non-aggregator single sequencer (#3389)
• Backfilled PR links on the existing ev-grpc removal and p2p-follower entries.

Not in this PR (release execution, after merge)

Tags are not pushed here. The release sequence per RELEASE.md, once this merges:

1. core/v1.1.0 → wait for proxy propagation
2. v1.2.0 (ev-node root), execution/evm/vX
3. Comment-out replaces + bump apps → tag apps/*/v1.2.0
4. Bring back dev replaces

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features

  • Added proposer key rotation support.
  • Added preparation for the Amsterdam fork through execution and engine API upgrades.

• Bug Fixes

  • Improved readiness reporting and P2P synchronization for non-aggregator nodes.
  • Prevented unsupported net-info output formats.
  • Avoided creating a single sequencer for non-aggregator nodes.

• Removed

  • Removed obsolete execution gRPC components.

[github-actions]

The latest Buf updates on your PR. Results from workflow CI / buf-check (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	⏩ skipped	✅ passed	⏩ skipped	Jul 20, 2026, 6:58 AM

[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: aae5daea-39d7-4550-998e-0e406c7e594c

📥 Commits

Reviewing files that changed from the base of the PR and between f59b331 and 5a6192c.

📒 Files selected for processing (1)

• CHANGELOG.md

---

📝 Walkthrough

Walkthrough

The changelog adds a v1.2.0 release section covering new capabilities, removed components, and fixes for node readiness, synchronization, and sequencing behavior.

Changes

v1.2.0 release notes

Layer / File(s)	Summary
v1.2.0 release entries CHANGELOG.md	Adds proposer key rotation and Amsterdam-fork preparation notes, documents removal of obsolete gRPC components, and expands fixes for non-aggregator behavior, DA/P2P synchronization, readiness reporting, and unsupported output formats.

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

Possibly related PRs

• evstack/ev-node#3345: Also reshapes the v1.2.0 changelog section and relocates fixed entries.

Suggested reviewers: julienrbrt, chatton

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title is concise and accurately reflects the release-prep changelog update.
Description check	✅ Passed	The description covers the release rationale, changelog updates, and what is excluded from this PR.
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 chore/prep-1.2.0

---

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.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 62.33%. Comparing base (f59b331) to head (5a6192c).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3390      +/-   ##
==========================================
- Coverage   62.34%   62.33%   -0.02%     
==========================================
  Files         120      120              
  Lines       13454    13454              
==========================================
- Hits         8388     8386       -2     
- Misses       4125     4126       +1     
- Partials      941      942       +1     

Flag	Coverage Δ
combined	62.33% <ø> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.