Add a consistent pool manager

[Sapessii]

Describe the bug
Fix the lack of a consistent pool manager.
Basically when using supabase and loading memgpt with tons of user I get that I have reached the max number of client connections.
For reference a message on discord (https://discord.com/channels/1161736243340640419/1162177332350558339/1257022675021463654)

If you have any better alternative of the db to use please let me know!

Please describe your setup

• deployed docker on render.com

MemGPT Config
Just using the standard configuration with this db url: postgresql+pg8000://postgres.xxxxx:[e-mail]:6543/postgres

Thank you :)

[Zac]

This also impacts deployments with only a couple users, 2 + the default user account.

I setup new deployment in Google Cloud Run + Supabase (Nano) and followed the steps below.

1. Python client:

• Created 2 users

2. Browser:

• Opened 1 browser for each (2) user account

3. Python client:

• Created 2 humans
• Created 2 persona
• Created 2 agents

4. Browser:

• Sent a message and then noticed the Max client connections reached error appear in the logs prior to receiving a response.

Note: When I built the image and ran container locally, I executed a couple 'list' commands with the python client.