I would suggest looking at Wazuh and setting up a SIEM stack based on it. It would provide what you need and is highly customisable to needs.

good work, it looks awesome.

Can you maybe make like a gif or few second video of bot interaction so people can quickly see the full potential ?

I haven't had first hand experience with gitea, but there would be some fine tuning that might ease the memory usage. What backend have you deployed ? You can make some config adjustment to it. If memory constrained, then swapiness could be set and any monitoring could be disabled or kept bare minimum. I read somewhere its useful to pprof https://github.com/google/pprof to get some insight about visually test memory usage, though haven't used it.

Those values depends on the use case. You can set min and max values and fine tune as the need occurs. Some extensive information are discussed in these links:

https://docs.vmware.com/en/VMware-GemFire/10.0/gf/managing-monitor_tune-system_member_performance_jvm_mem_settings.html

https://stackoverflow.com/questions/14763079/what-are-the-xms-and-xmx-parameters-when-starting-jvm

https://www.elastic.co/guide/en/elasticsearch/reference/current/advanced-configuration.html