Eval jobs exported to S3; events-only export enforced on self-hosted

What's Changed

• fix(events): apply score filters to every event stream by @sumerman in https://github.com/langfuse/langfuse/pull/14975
• chore(agents): codify regional-twin tickets and cause-trailer in incident-alert-tickets skill by @niklassemmler in https://github.com/langfuse/langfuse/pull/15164
• feat(worker): export eval job configurations in core data S3 export by @maxdeichmann in https://github.com/langfuse/langfuse/pull/15167
• fix(dashboards): return 404 instead of 500 when deleting a missing dashboard by @niklassemmler in https://github.com/langfuse/langfuse/pull/15170
• feat(blob-storage): force EVENTS export source on events_only self-hosted deployments (LFE-10148) by @niklassemmler in https://github.com/langfuse/langfuse/pull/14928
• fix(auth): return 400 instead of 500 for invalid callbackUrl by @niklassemmler in https://github.com/langfuse/langfuse/pull/15171

Full Changelog: https://github.com/langfuse/langfuse/compare/v3.217.0...v3.218.0