Release v0.9.9

Changelog since v0.9.8

Notable Changes

• Re-enable supporting MongoDB (#1794)
• Add a new configuration field for the ANALYSIS stage named "skipOnNoData" which can control how to handle no data case. (#1771)

Internal Changes

• Add build cache for building play image (#1797)
• Add MongoDB configuration docs (#1796)
• Add playground build job to the CI (#1793)
• Add an util method to the web test utils (#1791)
• Add UpdateServicePrimaryTaskSet to ECS deployment (#1784)
• Refactor deployment config form (#1787)
• Handle cancel signal in case it came on the previous stage (#1790)
• Fix error format on print rollback error message (#1789)
• Update CI config for web testing (#1788)
• Update web test config (#1783)