Important Changes

• Sessions infrastructure has been deprecated. Release health now runs on the metrics backend
• Discord integration is now live!
• ProjectUserDetailsEndpoint has been deleted.

Various fixes & improvements

• feat: provide a toggle to enable discord integration (#2548) by @aldy505
• ref: fix a typo (#2556) by @asottile-sentry
• ref: use git branch --show-current instead of sed (#2550) by @asottile-sentry
• Remove sessions infra (#2514) by @hubertdeng123
• Upgrade Clickhouse to 21.8 (#2536) by @hubertdeng123
• [Snyk] Security upgrade debian from bullseye-slim to bookworm-20231009-slim (#2511) by @Indigi-managed
• snuba: Remove deprecated CLI arg (#2515) by @lynnagara