Add E2E decision tests

[Timothy-Gonzalez]

• [x] Get decision
• [x] Get filtered decision
• [x] Post decision
• [x] Post decision finalize (Already handled by add_accept_finalize_user_test

[Timothy-Gonzalez]

Had to force push to fix GPG signing, I'm very sorry

[Timothy-Gonzalez]

add_accept_finalize_user_test seems to be having some race condition where dropping the decisions database in another test causes this issue:

[Timothy-Gonzalez]

@Nydauron I've completed the changes requested, should be good! (Also fixed a little typo)

[Timothy-Gonzalez]

add_accept_finalize_user_test is failing again, we might need to disable it temporarily if this keeps happening randomly...