Move 1.27.0 release notes

[brianaj]

• Did you write/update appropriate tests
• Release notes updated (if appropriate)
• Appropriate logging output
• Issue linked
• Docs updated (or issue created)
• New package licenses are added to ThirdPartyNotices.txt (if applicable)

[Copilot]

Pull request overview

Archives the 1.27.0 release notes into the releasenotes/ folder and updates the repository’s “latest version” marker as part of the CLI release process.

Changes:

• Moved the 1.27.0 bullet-list release notes out of RELEASENOTES.md into a versioned file under releasenotes/.
• Cleared RELEASENOTES.md after archiving.
• Updated LATEST-VERSION.txt to reflect 1.27.0.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
releasenotes/1.27.0.md	Adds archived 1.27.0 release notes (but filename format differs from established convention).
RELEASENOTES.md	Removes the 1.27.0 notes from the “current” release notes file (leaving it empty).
LATEST-VERSION.txt	Updates latest version marker (but drops the leading v, diverging from CI/tag convention).

[github-actions]

Unit Test Results

    1 files      1 suites   10m 25s ⏱️
1 030 tests 1 030 ✅ 0 💤 0 ❌
1 031 runs  1 031 ✅ 0 💤 0 ❌

Results for commit c1fa2e6.

♻️ This comment has been updated with latest results.

[github-actions]

Package	Line Rate	Branch Rate	Complexity	Health
ado2gh	71%	70%	737	➖
Octoshift	84%	73%	1810	✔
bbs2gh	83%	78%	663	✔
gei	81%	73%	608	✔
Summary	81% (7938 / 9823)	73% (1947 / 2649)	3818	✔

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.