AccountsDb plugin for transactions -- part 4 -- persisting to the Db.
1. DB models for transactions
2. Rust models for transactions
3. Transform from SDK models to rust db models
4. Unit tests
Summary of Changes
Added the reference postgresql.conf
Prepare slot update statement to reduce overhead in updating slot
Support custom connection string
Allow the plugin to panic on replication issues to ensure consistency
Use bulk insertion to Postgres at startup to reduce time taken for initial snapshot restore for postgres plugin. Avoid duplicate writes of accounts at startup. Doing account plugin notification and indexing in parallel.
Improved error handling for postgres plugin to show the real db issues for debug purpose
Added more metrics for postgres plugin.
Refactored plugin centric code out to a sub module from accounts_db and added unit tests
Support using connection pooling and use multiple threads to do Postgres db operations. The performance is improved from 1500 RPS to 40,000 RPS measured during validator start.
Support multiple plugins at the same time.
