feat: implement Background service for databend #11751
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* feat: background service patch 1(schema definitions) * feat: add kv api for background tasks * feat: add background_task apis with unit-test * feat: add background job schema * save * feat: add compaction background job * save * save * save * add task logics * save * save * save * save * feat: refactor background apis * feat: add apis * save * save * lint * license * license * license * fix debug settings * fix comment * fix * remove unneeded stats * fix comment * fix unit tests * fix * fix comment * remove unneeded kv call * fix * f
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Summary
Databend Internal Storage FuseTable is similar to Apache Iceberg, which is a Log Structured Table and need to compact/recluster/vacuum table regularly to merge small data chunks, sort them by the cluster key or vacuum unneeded branches.
Previously, those implementation rely on different drivers which add some complexity for infrastructure as we need to deploy and maintain additional service to trigger driver events.
Thus we need to introduce the Background Service, which allow to run databend as a background one-shot job or as a background daemon to run cron jobs,
jobs may trigger table maintainence tasks, for example, automatic compaction/vacuum/recluster by cron based/ critiria based without additional maintainence needed
This implementation contain:
one_shot,interval,cronjob type.Not contain:
Closes #issue