[Integrations] Add user to JIra status sync update activities

In [https://github.com/getsentry/sentry/pull/62599]() we added the integration that updated the issue's status via sync. If jira is sending us the performing user details we could say "Scott marked this as unresolved via Jira".

ACs:

* Add webhook payload types to the jira sync webhook since there are none
* If jira passes an email, find a matching sentry user and set them as the user that performed the issue activity

We want to define a set of [lightweight metrics]() that SDKs can automatically collect for e.g. framework, language or platform, focusing only on signals that **do NOT overlap with Tracing**. Ideally these metrics should give a quick sense of app or runtime health, … while deeper investigation will still rely on traces or profiles.

Examples**:**

* Node.js runtime metrics (e.g., event loop delay, heap usage)
* Prisma-related metrics in Next.js
* Mobile CPU / memory usage to help surface potential ANRs or app hangs

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**Candidate Metrics (add more below)**

* …

*(please also add ideas, questions or examples in comments)*