[REFACTOR] Add pool connection for PostgreSQL

[shivamvijaywargi]

Is your feature request related to a problem? Please describe.
We can optimize DB calls if we use pool connections

Describe the solution you'd like
Implement pool to optimize DB calls
Ex: Min: 1, Max: 10 or something like that with a connectionTimeout: 5000ms

Describe alternatives you've considered
NA

Additional context
Need to check if this is required at the moment or not