Legal API - Outstanding Broken Legal API Tests

Any test broken test that is not part of the work in #19828, #20487, digital credentials and reports, will need to be addressed in this ticket.

**TODOs**

- [ ] Fix outstanding broken unit tests in legal api. Can skip #19828, digital credential, report and `models/test_legal_entity.py` related tests

**_From running tests locally, these are the tests I can see broken. Note: this is a reduced version. A lot of parameterized tests are broken_**
```
FAILED tests/unit/resources/v2/test_business_parties.py::test_get_business_parties_one_party_multiple_roles[public-user-public_user] - AttributeError: can't set attribute 'entity_type'
FAILED tests/unit/resources/v2/test_business_parties.py::test_get_business_parties_multiple_parties - AttributeError: can't set attribute 'entity_type'
FAILED tests/unit/resources/v2/test_business_parties.py::test_get_business_party_by_id - AttributeError: can't set attribute 'entity_type'
FAILED tests/unit/resources/v2/test_business_tasks.py::test_get_tasks_current_year_filing_exists - AssertionError: assert 6 == 1
FAILED tests/unit/resources/v2/test_business_tasks.py::test_temp_reg_filing_task[TODO_EXISTS_DRAFT_FILING-DRAFT-T1234561] - KeyError: 0
FAILED tests/unit/resources/v2/test_ops.py::test_ops_healthz_success - assert 500 == 200
FAILED tests/unit/resources/v2/test_request_tracker.py::test_get_bn_request_trackers - TypeError: factory_legal_entity() got an unexpected keyword argument '_entity_type'
FAILED tests/unit/resources/v2/test_request_tracker.py::test_get_request_tracker - TypeError: factory_legal_entity() got an unexpected keyword argument '_entity_type'
FAILED tests/unit/resources/v2/test_request_tracker.py::test_resubmit_bn_request[1--FM0000001] - TypeError: factory_legal_entity() got an unexpected keyword argument '_entity_type'
FAILED tests/unit/resources/v2/test_business_filings/test_filing_documents.py::test_missing_filing - assert 500 ==
FAILED tests/unit/resources/v2/test_business_filings/test_filing_documents.py::test_unpaid_filing - assert 500 ==
FAILED tests/unit/resources/v2/test_business_filings/test_filing_documents.py::test_document_list_for_various_filing_states[special_res_paper-CP7654321-CP-specialResolution-legal_filing_10-None-None-PAPER_ONLY-expected_msg0-HTTPStatus.NOT_FOUND-None] - assert 500 ==
FAILED tests/unit/resources/v2/test_business_filings/test_filing_documents.py::test_document_list_for_various_filing_states[special_res_pending-CP7654321-CP-specialResolution-legal_filing_11-None-None-PENDING-expected_msg1-HTTPStatus.NOT_FOUND-None] - assert 500 ==
FAILED tests/unit/resources/v2/test_business_filings/test_filing_documents.py::test_get_receipt_request_mock - assert 500 ==
FAILED tests/unit/resources/v2/test_business_filings/test_filings.py::test_get_empty_filings_with_invalid_business - assert 500 ==
FAILED tests/unit/resources/v2/test_business_filings/test_filings.py::test_post_empty_annual_report_to_a_business - assert {'message': "...ation/json'."} == {'detail': "U...is required."}
FAILED tests/unit/resources/v2/test_business_filings/test_filings.py::test_update_ar_with_missing_json_body_fails - assert {'message': "...ation/json'."} == {'detail': "U...is required."}
FAILED tests/unit/resources/v2/test_business_filings/test_internal.py::test_post_pre_load_colin_filing - assert 403 ==
FAILED tests/unit/resources/v2/test_business_filings/test_internal.py::test_post_colin_last_update - AssertionError: assert {'id': 3, 'la...017644+00:00'} == {'maxId': 1234}
```

Start by running the listed tests under tests/unit/resources/v2/, excluding the tests covered by #19828, #20487, digital credentials, reports, and models/test_legal_entity.py. Group the failures by test file and verify the full legal API test set passes without the excluded areas remaining broken.

Written by the indexing model from the issue text.