Backport release/v6.6: Update changelog in prep to cut 6.6 RC1

[seidroid]

Backport of #3685 to release/v6.6.

[cursor]

PR Summary

Low Risk
Documentation-only change to CHANGELOG.md; no application, consensus, or infrastructure behavior is modified.

Overview
Updates CHANGELOG.md under v6.6 by inserting eight new PR entries at the top of the sei-chain list (above the existing pre-compile line), documenting recent work slated for the 6.6 RC1 cut.

The new lines cover backported items such as state store compaction after prune, Prometheus metrics fix, multiversion iterator hardening, evmone absolute-path requirement, go-ethereum bump, GHA checkout update, v6.6 changelog generation, and CW20/EVM co-broadcast—without changing any runtime code.

^{Reviewed by Cursor Bugbot for commit e8fc68b. Bugbot is set up for automated code reviews on this repo. Configure here.}

[github-actions]

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

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Jul 1, 2026, 4:57 PM

[claude]

LGTM — changelog-only update for the 6.6 RC1 cut.

Extended reasoning...

Overview

Documentation-only change to CHANGELOG.md under the v6.6 section, adding eight PR references for the 6.6 RC1 cut. No runtime, config, or build code is modified.

Security risks

None. This is a Markdown documentation file; it has no effect on consensus, runtime, or infrastructure behavior.

Level of scrutiny

Minimal. Changelog-only edits are mechanical and safe to approve without human review, provided the PR references are plausible (they are — all reference recently merged sei-chain PRs consistent with recent commit history).

Other factors

The bug hunting system found no issues, and this is a straightforward backport of #3685 to release/v6.6.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.05%. Comparing base (057a89a) to head (e8fc68b).
⚠️ Report is 1 commits behind head on release/v6.6.

Additional details and impacted files

@@               Coverage Diff                @@
##           release/v6.6    #3686      +/-   ##
================================================
- Coverage         58.93%   58.05%   -0.88%     
================================================
  Files              2225     2151      -74     
  Lines            183564   175017    -8547     
================================================
- Hits             108182   101607    -6575     
+ Misses            65656    64384    -1272     
+ Partials           9726     9026     -700     

Flag	Coverage Δ
sei-db	70.41% <ø> (ø)
sei-db-state-db	?

Flags with carried forward coverage won't be shown. Click here to find out more.
see 74 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.