Update v6.6 change log in prep to cut v6.6.3 patch

[alexander-sei]

Systematic changelog re-generation for the v6.6.3 patch release.

[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	Aug 28, 2026, 5:58 PM

[seidroid]

Documentation-only change adding six entries to the ## v6.6 CHANGELOG section ahead of the v6.6.3 patch cut. Each entry's PR number, title, and release/v6.6 merge target were verified against GitHub, and the ordering and link format match the existing section.

Findings: 0 blocking | 0 non-blocking | 0 posted inline

Blockers

• None at the file/PR level.

Non-blocking

• None at the file/PR level.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.28%. Comparing base (f28da4c) to head (8769c06).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4033      +/-   ##
==========================================
- Coverage   61.31%   60.28%   -1.03%     
==========================================
  Files        2154     2055      -99     
  Lines      188505   176732   -11773     
==========================================
- Hits       115582   106547    -9035     
+ Misses      62173    60406    -1767     
+ Partials    10750     9779     -971     

Flag	Coverage Δ
sei-db	69.80% <ø> (ø)
sei-db-state-db	?

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see 99 files with indirect coverage changes

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[cursor]

PR Summary

Low Risk
Documentation-only changelog update with no runtime or behavioral changes.

Overview
Prep for the v6.6.3 patch by regenerating the ## v6.6 changelog: ten new bullets are inserted at the top of the sei-chain list (newest first), ahead of the existing #3957 entry.

The added lines record recent release/v6.6 backports and release chores that were missing from the file—freeze-mode / historical EVM RPC (#3978, #4006), frozen RPC router hardening and Docker integration (#4024, #4034, #4048), memiavl snapshot fixes and validation (#4007, #4050, #4053), plus v6.6.2 version/changelog bumps (#3965, #3966). No application code, config, or tests change in this PR.

^{Reviewed by Cursor Bugbot for commit 8769c06. Bugbot is set up for automated code reviews on this repo. Configure here.}

[seidroid]

Created backport PR for release/v6.6:

• Backport release/v6.6: Update v6.6 change log in prep to cut v6.6.3 patch #4055 with remaining conflicts!

Please cherry-pick the changes locally and resolve any conflicts.

git fetch origin backport-4033-to-release/v6.6
git worktree add --checkout .worktree/backport-4033-to-release/v6.6 backport-4033-to-release/v6.6
cd .worktree/backport-4033-to-release/v6.6
git reset --hard HEAD^
git cherry-pick -x ea3836f1a987a3fd31820fcb6c0078e625bf50e7
git push --force-with-lease