Support epoch_micro in date processor patterns

[oeyh]

Is your feature request related to a problem? Please describe.
We do support epoch_second, epoch_mili and epoch_nano, but noticed some users need epoch_micro as well.

We have a workaround using value_expression in add_entires to convert micro seconds to other format we support. But we might as well add this epoch_micro option to save the need for an additional processor.

Describe the solution you'd like
Support epoch_micro in date processor patterns

Describe alternatives you've considered (Optional)
Use value_expression in add_entires to convert micro seconds to other format we support

Additional context
N/A

[Utkarsh-Aga]

Hello @oeyh
Can I contribute to this, as this is marked with good first issue ?
If yes, can you let me know the process for contribution ?

[oeyh]

@Utkarsh-Aga Absolutely. Thank you for offering to do this!
Please refer to this guideline for the process to open pull requests. Also you may find this developer guide helpful. Feel free to let us know if you have further questions.

[Utkarsh-Aga]

Sure, Thanks a lot :)