Fixes

• 🐛 Fix status_code being ignored for SSE and JSONL streaming endpoints. PR #15937 by @SAURABHSALVE.

Docs

• 📝 Fix format_sse_event docstring rendering of \n\n terminator. PR #15613 by @AshNicolus.
• 📝 Add API reference page for fastapi.sse. PR #15930 by @SAURABHSALVE.