Add 'transaction' and 'breadcrumbs' in event

[yrom]

ref docs:
transaction: https://docs.sentry.io/development/sdk-dev/event-payloads/#optional-attributes
contexts: https://docs.sentry.io/development/sdk-dev/event-payloads/contexts/
breadcrumbs: https://docs.sentry.io/development/sdk-dev/event-payloads/breadcrumbs/

There is a related pr #40 when i create this pr. In my opinion, the Event class should know nothing about what the contexts have, so i did not create the wrapper class for the os,device,etc which it might contains.

[SammyO]

+1 to get this merged

[yjbanov]

Transaction and breadcrumbs LGTM. Let's leave contexts out of this PR. #40 is adding a fully schemed version of it.

[yrom]

@yjbanov The 'contexts' was discarded.

[yjbanov]

Thanks, just a couple more things I noticed.

[yrom]

@yjbanov Thanks for reviewing. Request changes applied.

[yjbanov]

@yrom Curious, why did you decide to rollback the timestamp in cd69392?

[yrom]

@yjbanov Looked up the sentry-java SDK.
See https://github.com/getsentry/sentry-java/blob/master/sentry/src/main/java/io/sentry/marshaller/json/JsonMarshaller.java#L299.
They were using timestamp. 😅

[jaumard]

Would love to have this and "Context" merged, as currently reporting is quite light :)

[yjbanov]

@yjbanov Looked up the sentry-java SDK.
See https://github.com/getsentry/sentry-java/blob/master/sentry/src/main/java/io/sentry/marshaller/json/JsonMarshaller.java#L299.
They were using timestamp.

Would you mind trying formatDateAsIso8601WithSecondPrecision instead? This way we'd consistently use the same date-time formatting throughout the client.

[yrom]

@yjbanov Sorrry for my late reply. I have updated the commits, again.

[yjbanov]

LGTM! Thank you for contributing this feature!