User Defined Source: Add functionality to tag messages

[VaishaliGupta16]

Summary

What change needs making? In the User-defined source, I would like to have the ability to add tags to the messages.

Use Cases

When would you use this? By adding tags to the messages in user defined sources, we can route the messages using conditional forwarding.

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Message from the maintainers:

If you wish to see this enhancement implemented please add a 👍 reaction to this issue! We often sort issues this way to know what to prioritize.

[vigith]

Is there any particular reason you do not want to use a source-transformer?

[rishhavv]

@vigith i can pick this up, if it's in roadmap

[vigith]

absolutely, thank you

[kohlisid]

@rishhavv Are you still working on this?