DESENG-452 : Applying pending migrations

[ratheesh-aot]

Issue: https://apps.itsm.gov.bc.ca/jira/browse/DESENG-452

Description of changes:

1. Change some foreign key field to nullbale false in model files
   

2. Change `rejected_reason_other` to nullable true in `submission` model
   

3. Generated new migration file based on the pending model changes which confirmed to be valid
   

4. Updated Unittest of Email verification to send `type` to the api
   

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of the met-public license (Apache 2.0).

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (23faaae) 71.80% compared to head (2d80b6e) 71.82%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2378      +/-   ##
==========================================
+ Coverage   71.80%   71.82%   +0.01%     
==========================================
  Files         509      509              
  Lines       16916    16916              
  Branches     1288     1288              
==========================================
+ Hits        12147    12150       +3     
+ Misses       4529     4526       -3     
  Partials      240      240              

Flag	Coverage Δ
metapi	86.45% <100.00%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
met-api/src/met_api/models/submission.py	80.21% <100.00%> (ø)
met-api/src/met_api/models/timeline_event.py	75.00% <100.00%> (ø)
met-api/src/met_api/models/widget_timeline.py	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes