Improvements to python server

[deedy5]

1. updated and simplified requirements.txt,
2. requests have been replaced with httpx,
3. ruff formatted for better compliance with python,
4. unnecessary imports removed,
5. minor feature enhancements.

[deedy5]

Unfortunately, there are no tests and I can't make sure everything works as it should.
But I have done all the operations from deprecated-do-not-use-start_server.sh - all dependencies are installed without conflicts, the server starts and responds to requests.

I think the server can be installed and started using deprecated-do-not-use-start_server.sh.
At least on linux it works now.

Will need to finalize it some more:

1. Rename the names of all variables and functions to match pep8.
2. Develop tests so that you can quickly check that everything is working as it should.