Improvements on `postgres_plugin`

[harrywong]

1. Support partition in postgres (uses pg_pathman).
   • Build pg_pathman into postgres docker image. Currently we use image from bitnami, maybe we need to build our one.
   • Update sql to create partition.
2. Improve query performance
   • Analysis current query sql to find the complex queries and add necessary indexes.
   • Analysis partition performance impact.
3. Support all the actions: Currently postgres_plugin don't support all the actions(e.g. lock, bonus, suspend) processing.

[ceeji]

These improvements are great, partition and indexs and very crucial for long-term data volume.