docs: assign version header for v1.0.0 in CHANGELOG

[laurentiu021]

Assigns [1.0.0] header to the released entry.

Summary by CodeRabbit

• Documentation
  • Changelog updated with version 1.0.0 release information (May 20, 2026).

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: ff41d425-45a8-4785-af36-2a8b5020dd38

📥 Commits

Reviewing files that changed from the base of the PR and between 9f8252b and 4bde1db.

📒 Files selected for processing (1)

• CHANGELOG.md

📜 Recent review details

🔇 Additional comments (1)

CHANGELOG.md (1)

9-10: LGTM!

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📝 Walkthrough

Walkthrough

The PR adds a new release section header documenting version 1.0.0 with release date 2026-05-20 to CHANGELOG.md, positioned immediately after the Unreleased section. This is a documentation-only change.

Changes

Release Documentation

Layer / File(s)	Summary
1.0.0 Release Entry CHANGELOG.md	New release section header for version 1.0.0 dated 2026-05-20 added to the changelog immediately following the Unreleased section.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~1 minute

Possibly related PRs

• laurentiu021/SystemManager#432: Both PRs only add a new versioned release header immediately after the ## [Unreleased] section in CHANGELOG.md, so the change sets are directly related.
• laurentiu021/SystemManager#464: Both PRs modify CHANGELOG.md by adding a new ## [x.y.z] - 2026-05-20 release section right after ## [Unreleased] (i.e., they touch the same changelog header structure).
• laurentiu021/SystemManager#355: Both PRs make direct edits to the same CHANGELOG.md section immediately under ## [Unreleased], changing only release header version/date text.

Poem

📝 A version released, at last! 🐰
One point oh sees the light,
The changelog sings its simple song,
No code, just dates so bright—
A milestone marked in markdown's way.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically describes the main change: adding a version header (v1.0.0) to the CHANGELOG documentation file.
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.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/changelog-v1.0.0

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