Update python django and postgresql

[rosswhitfield]

Ref 5460: LiveDataServer: Upgrade Django, Python and PostgreSQL

This moves the version of python to 3.12, django to 4.2 and postgresql to 16. And from psycopg2 to psycopg 3. Only a few settings needed to be updated.

Short description of the changes:

Long description of the changes:

Check list for the pull request

• I have read the [CONTRIBUTING]
• I have read the [CODE_OF_CONDUCT]
• I have added tests for my changes
• I have updated the documentation accordingly

Check list for the reviewer

• I have read the [CONTRIBUTING]
• I have verified the proposed changes
• best software practices
  • all internal functions have an underbar, as is python standard
  • clearly named variables (better to be verbose in variable names)
  • code comments explaining the intent of code blocks
• All the tests are passing
• The documentation is up to date
• code comments added when explaining intent

Manual test for the reviewer

References

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.14%. Comparing base (5f2c914) to head (0f978c5).

Additional details and impacted files

@@            Coverage Diff             @@
##             next      #20      +/-   ##
==========================================
+ Coverage   86.95%   87.14%   +0.18%     
==========================================
  Files          10       10              
  Lines         276      280       +4     
==========================================
+ Hits          240      244       +4     
  Misses         36       36              

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[jmborr]

manual test_client.py does create plots for json and html flavors in the local deploy of the app