Release v0.27.20

What's Changed

• feat(mods): emit llm_end for provider errors by @carenthomas in #3164
• chore(codeowners): add jnjpng as owner for websocket code by @kianjones9 in #3165
• fix(listener): reap half-open sockets on both listener transports by @kianjones9 in #3143
• chore: bump version to 0.27.20 by @github-actions[bot] in #3168

Full Changelog: v0.27.19...v0.27.20