Feature release v0.9.0

What's Changed

• do not lock PR after merge by @nitisht in #674
• fix: add stream creation time in get stats api by @gurjotkaur20 in #632
• fix: avoid removal of retention configuration while updating snapshot by @gurjotkaur20 in #673
• remove first-event-at from stream.json but keep it in stats api by @nikhilsinhacloudsurfex in #675
• prepare for release v0.9 by @nitisht in #678
• fix: Invalid Cargo.toml by @Eshanatnight in #680
• prepare for next release by @nitisht in #682

Full Changelog: v0.8.1...v0.9.0