Wire `cliff.toml` changelog generation into release pipeline

[nanaf6203-bit]

Problem Statement

cliff.toml is configured but no workflow consumes it.

Why it matters

Auto-generated changelogs free maintainers to focus on code.

Technical Context

Add release.yml invoking git-cliff --tag vX.Y.Z on every tag push.

Expected Outcome

Tags generate CHANGELOG.md + GitHub Release notes.

Acceptance Criteria

1. Workflow runs.
2. CHANGELOG.md produced.
3. Release draft populated.
4. Doc updated.

Implementation Notes

Use orhun/git-cliff-action.

Files or modules likely to be affected

.github/workflows/release.yml, cliff.toml.

Dependencies

None.

Difficulty level

MEDIUM.

Estimated effort

M (~2 days).

[Rayhab2000]

@Rayhab2000 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Please assign this issue to me

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[Superray23]

@Superray23 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

hi maintainer can i work on this issue ???

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