PostgreSQL support via the `pg` driver.
The Node.js agent now records the amount of time spent in transactions with PostgreSQL databases. This timing can be viewed in the Transactions page within individual transactions and their traces.
The agent supports all of the following `pg` usage scenarios:
- Using the "native" API exposed from `pg.native`
- Using the "native" API exposed directly from `pg` when the `NODE_PG_FORCE_NATIVE` environment variable is set