Add a new transplant endpoint

[Swatinem]

This endpoint pretty much just schedules a task which will copy over coverage reports from one commit to another.

---

The commits for this feature:

• Add new transplant_report task and logic worker#1190
• Add a new transplant endpoint #1276
• Add a new transplant-report command codecov-cli#677

[sentry-autofix]

✅ Sentry found no issues in your recent changes ✅

[codecov-notifications]

Codecov Report

Attention: Patch coverage is 90.90909% with 3 lines in your changes missing coverage. Please review.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
upload/views/transplant_report.py	93.33%	2 Missing ⚠️
services/task/task.py	50.00%	1 Missing ⚠️

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[codecov]

Codecov Report

Attention: Patch coverage is 90.90909% with 3 lines in your changes missing coverage. Please review.

Project coverage is 96.31%. Comparing base (a6b25ce) to head (23ae086).
Report is 2 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
upload/views/transplant_report.py	93.33%	2 Missing ⚠️
services/task/task.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1276      +/-   ##
==========================================
- Coverage   96.32%   96.31%   -0.02%     
==========================================
  Files         487      488       +1     
  Lines       16907    16940      +33     
==========================================
+ Hits        16285    16315      +30     
- Misses        622      625       +3     

Flag	Coverage Δ
unit	96.31% <90.90%> (-0.02%)	⬇️

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