BA-049 — Make course creation and revision append atomic

[MaryammAli]

• Type: Reliability
• Affected area: src/courses/course.service.ts, revision entity
• BackendAcademy
• Summary: A saved course without its immutable revision produces an incomplete audit trail.
• Acceptance criteria: Course and initial revision commit together; revision failure rolls back course creation.

[Stanley-Owoh]

@Stanley-Owoh has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Good day maintainer please assign this issue to me thank you

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[Husten150]

@Husten150 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I will like to apply for this

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Congratulations, @Husten150! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @Husten150: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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[grantfox-oss]

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

@Husten150's PR #712 was approved and merged by @MaryammAli.

🏆 @Husten150: You earned 40 FoxPoints for this contribution! Your current tier: Builder (1,388 total points). Track your full progress on GrantFox.

👏 Great work, @Husten150! Keep contributing to BlockDash-Studios.

[drips-wave]

This issue has been completed by @Husten150 as part of the Stellar Wave Program's 8th Wave 🥳

😎 @Husten150: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

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