Fix the following error:
Cannot use a pool after calling end on a pool
<img width="917" alt="Screenshot 2025-05-17 at 14 56 18"
src="https://github.com/user-attachments/assets/63081831-9a7e-4633-8274-de9f8a48dbae"
/>
The problem was that the datasource manager was destroying the
connections when a datasource cache expired.
This PR implements a global PostgreSQL connection pool sharing
mechanism.
- Patches pg.Pool to reuse connection pools across the application when
connection parameters match, reducing resource overhead.
- New environment variables allow enabling/disabling sharing and
configuring pool size, idle timeout, and client exit behavior.
WorkspaceDatasourceFactory will now use shared pools if enabled, this
will avoid recreating 10 connections for each pods for each workspace.
---------
Co-authored-by: Charles Bochet <charlesBochet@users.noreply.github.com>
