Enhancement: Add feature to manually retry failed task

[yashpapa6969]

Change Log

• API Update: Introduced the TaskReapply endpoint to reapply tasks with original arguments.
• Error Handling: Ensures JSON-serializable arguments and robust error logging.
• Backend Utilities: Added helper functions (parse_args, parse_kwargs, make_json_serializable) for argument parsing and serialization.

[iloveitaly]

@mher anything I can do to help get this merged?

[sc68cal]

My concerns have been addressed, thank you for this contribution!

[yashpapa6969]

@sc68cal how can i get this merged?

[sc68cal]

@sc68cal how can i get this merged?

I am not the maintainer, the maintainer needs to approve and merge

[marcus-campos]

Awesome!

[Ragnarow]

Thanks for the feature, @mher could we get this merged?

[matias-martini]

Hi! Thanks for adding this awesome feature @yashpapa6969 ! I tested it locally and noticed a small issue: I think we need to add a route for the new controller in flower/urls.py:

    (r"/api/task/reapply/(.+)", tasks.TaskReapply),

Otherwise the Retry button will fail with 404

[yashpapa6969]

@matias-martini thank you updated

[matias-martini]

@yashpapa6969 Thanks for the updates! 🙌

Would you mind adding a test for the new API endpoint? It'll help ensure we cover the most common cases.