Enhance Documentation: JSDoc for injectStaleWatermark

[tmdeveloper007]

Summary of What Has Been Done

This PR addresses issue #8339.

See the corresponding issue for full details.

Closes #8339

Note: Please assign this PR to the tmdeveloper007 account.

[retenta-bot]

This PR addresses issue #8339 by enhancing the documentation for the injectStaleWatermark function. Clear documentation is crucial for maintaining code quality and ensuring that future developers understand the function's purpose and usage. This is similar to past decisions where we focused on improving documentation and type safety, such as the explicit null handling for the User Details API. Thank you for your contribution, and please let me know if you need any further assistance!

[github-actions]

📦 Next.js Bundle Size Report (Gzipped Sizes)

✨ No significant bundle size changes detected.

📊 Summary of Totals

Category	PR Size	Base Size	Difference
Total JS	4052.50 KB	4052.50 KB	0 B
Total CSS	338.94 KB	338.94 KB	0 B

[Aamod007]

Clean JSDoc additions for the stale watermark functions. CI is failing — please check the logs.

Labels: level:beginner, quality:clean, type:docs, mentor:Aamod007

[Aamod007]

Re-reviewing after noting the only CI failure is Vercel authorization (not code-related). All other checks (Format · Lint · Typecheck · Test, Production Build, CodeQL) pass. Approving — the Vercel deploy auth is a repo-level config issue, not a code problem.