Changelog-bot GitHub Action

[nanaf6203-bit]

Problem Statement
PRs adding user-visible behaviour don't enforce a CHANGELOG line.

Acceptance Criteria

• A PR CI step that diffs src/lib.rs's public API surface and asserts
  a corresponding CHANGELOG.md line is added.

Files/Modules Likely Affected

• .github/workflows/ci.yml
• scripts/check_changelog.sh

Difficulty Medium. Estimated Effort S.

Labels
area:ci, priority:medium

---

Imported from docs/open-issues-draft.md as draft issue #52 (commit 7becd4b). Original draft-order cross-references in this body have been remapped to current GitHub issue numbers at import time.

[GBOYEE]

Hi team — I'd like to take this on as part of the GrantFox campaign. I'll implement it and open a PR referencing this issue shortly.

[precy41]

hi, can I work on this please

[grantfox-oss]

🦊 GrantFox — @precy41 has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #112)
2. Your PR will be reviewed by the StellarTips maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign | FWC26 campaign!

@precy41's PR #145 was approved and merged by @nanaf6203-bit.

🏆 @precy41: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (51 total points). Track your full progress on GrantFox.

👏 Great work, @precy41! Keep contributing to StellarTips.