Changelog

What's changed

• Add STREAM_SETTINGS_ATOMIC
• Add process metrics
• Change search leader to querier for single time range query for alert
• Improve tantivy generate 20%
• Add more slow debug logs for http request in queue for bulk api
• Add debug logs for a unkown panic which maybe related to tantivy
• Let ingester can keep provide searching when it set to unScheduled
• Add alert variables, alert_trigger_time, alert_trigger_time_millis, alert_trigger_time_seconds