chore(event formatter): use formatter for copy to markdown

[shayna-ch]

to be merged after #119545

Wires the issue-details "Copy to Markdown" action to the shared formatter. The event-details and autofix queries now request ?llmFormat=markdown, and when the API returns a formatted payload the copy output is built from that server-rendered markdown (issue ID / project / date header + the formatted event body, plus the autofix markdown when present). When formatted is absent, it falls back to the existing client-side markdown builder.

No behavioral change on merge. behind the issues.standardized-markdown-for-llm option. Rollout will happen gradually via feature flag.

[github-actions]

🚨 Warning: This pull request contains Frontend and Backend changes!

It's discouraged to make changes to Sentry's Frontend and Backend in a single pull request. The Frontend and Backend are not atomically deployed. If the changes are interdependent of each other, they must be separated into two pull requests and be made forward or backwards compatible, such that the Backend or Frontend can be safely deployed independently.

Have questions? Please ask in the #discuss-dev-infra channel.

[shayna-ch]

bugbot run

[cursor]

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^{Reviewed by Cursor Bugbot for commit 0e30e19. Configure here.}

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit 7a5ecc6. Configure here.}

[cursor]

Server path drops autofix content

Medium Severity

When event.formatted is present, issueAndEventToMarkdown returns early and only appends autofixFormatted, ignoring autofixData. If server-formatted autofix is missing while cached autofix state still has root cause or solution content, that Seer analysis is omitted from the copied markdown.

 

^{Reviewed by Cursor Bugbot for commit 7a5ecc6. Configure here.}