Remove jsonpickle

[dgboss]

Our code base (including tests) doesn't import from jsonpickle and it doesn't appear to be a dependency of anything so it can be removed.

Also note that our deployments are now using poetry 1.8.4. The poetry.lock included in this PR was generated with poetry v1.8.4.

Test Links:

Landing Page
MoreCast
Percentile Calculator
C-Haines
FireBat
FireBat bookmark
Auto Spatial Advisory (ASA)
HFI Calculator

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.40%. Comparing base (b04be48) to head (f5738a3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4113   +/-   ##
=======================================
  Coverage   80.40%   80.40%           
=======================================
  Files         309      309           
  Lines       11860    11860           
  Branches      537      537           
=======================================
  Hits         9536     9536           
  Misses       2138     2138           
  Partials      186      186           

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