0.4.21

What's Changed

• add back lib by @areibman in #1222
• updated gitignore by @areibman in #1223
• new screenshots by @areibman in #1224
• feat(sync): sync OSS distribution from AgentOps.Next ($(cd ../next-repo && git rev-parse --short HEAD)) by @devin-ai-integration[bot] in #1226
• feat(sync): sync documentation updates from AgentOps.Next by @devin-ai-integration[bot] in #1227
• docs(app): Add Beginner Quickstart and troubleshooting to run full-stack locally by @devin-ai-integration[bot] in #1228
• Add working Haystack example, wire into CI, and update docs by @devin-ai-integration[bot] in #1230
• feat(haystack): auto-instrument Haystack 2.x generators incl. AzureOpenAIChatGenerator; add Azure example + docs by @devin-ai-integration[bot] in #1231
• Update pyproject.toml by @areibman in #1232

Full Changelog: 0.4.20...0.4.21