Update test configuration and environment

[kofrezo]

• Use PostgreSQL 17 for web and db service as well as in tests
• Run tests with 3.9 (Debian Bullseye) and 3.13 (Debian Trixie)
• Set range of supported Python versions to >=3.9,<3.14

[seqizz]

I see some escape sequence which are not visible on the main branch when triggered from scratch (now I managed to make both work):

web-1  | /code/serveradmin/serverdb/sql_generator.py:226: SyntaxWarning: invalid escape sequence '\.'
web-1  |   "server.hostname ~ ('\\A[^\.]+\.' || regexp_replace("
web-1  | /code/serveradmin/serverdb/sql_generator.py:227: SyntaxWarning: invalid escape sequence '\*'
web-1  |   "sub.hostname, '(\*|\-|\.)', '\\\1', 'g') || '\\Z')",
web-1  | Loading .env environment variables...
web-1  | Couldn't load serveradmin config from /code/serveradmin/local_settings.py
web-1  | Couldn't load serveradmin config from /etc/serveradmin/settings.py
web-1  | /code/serveradmin/serverdb/sql_generator.py:226: SyntaxWarning: invalid escape sequence '\.'
web-1  |   "server.hostname ~ ('\\A[^\.]+\.' || regexp_replace("
web-1  | /code/serveradmin/serverdb/sql_generator.py:227: SyntaxWarning: invalid escape sequence '\*'
web-1  |   "sub.hostname, '(\*|\-|\.)', '\\\1', 'g') || '\\Z')",

But that is just the cosmetic side, functionally it works nice.

[kofrezo]

I see some escape sequence which are not visible on the main branch when triggered from scratch (now I managed to make both work):

web-1  | /code/serveradmin/serverdb/sql_generator.py:226: SyntaxWarning: invalid escape sequence '\.'
web-1  |   "server.hostname ~ ('\\A[^\.]+\.' || regexp_replace("
web-1  | /code/serveradmin/serverdb/sql_generator.py:227: SyntaxWarning: invalid escape sequence '\*'
web-1  |   "sub.hostname, '(\*|\-|\.)', '\\\1', 'g') || '\\Z')",
web-1  | Loading .env environment variables...
web-1  | Couldn't load serveradmin config from /code/serveradmin/local_settings.py
web-1  | Couldn't load serveradmin config from /etc/serveradmin/settings.py
web-1  | /code/serveradmin/serverdb/sql_generator.py:226: SyntaxWarning: invalid escape sequence '\.'
web-1  |   "server.hostname ~ ('\\A[^\.]+\.' || regexp_replace("
web-1  | /code/serveradmin/serverdb/sql_generator.py:227: SyntaxWarning: invalid escape sequence '\*'
web-1  |   "sub.hostname, '(\*|\-|\.)', '\\\1', 'g') || '\\Z')",

But that is just the cosmetic side, functionally it works nice.

Hmm yeah. I will tackle that later in a different PR.