[FEATURE] Add mysql, postgres support to agent memory

[takefy-dev]

I don't know why this is not by default and why it's sqlite by default, been 2 weeks still no support of mysql, postgres, redis ect. I'm running on a uge ecommerce website already got 2k2 session in 4 days, sqlite is slow it makes crash flowise makes it unsuable...

[kumar-asista]

@HenryHengZJ

how to set limit for Agent Memory node?

i can limit is used while select chat messages, hot to set this parameter?

@takefy-dev do you found any workaround?

[HenryHengZJ]

PR opened: #3495

@kumar-asista you can't set limit for agent memory for now