[backend] Added bulk create expectation traces endpoint

[impolitepanda]

Proposed changes

• Added bulk create expectation traces endpoint

Related issues

• Closes Performance improvement: bulk insert expectation traces and results #2873

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality
• For bug fix -> I implemented a test that covers the bug

[codecov]

Codecov Report

Attention: Patch coverage is 91.13924% with 7 lines in your changes missing coverage. Please review.

Project coverage is 40.30%. Comparing base (590a994) to head (cce271f).
Report is 1 commits behind head on release/current.

Files with missing lines	Patch %	Lines
...a/io/openbas/service/InjectExpectationService.java	84.84%	3 Missing and 2 partials ⚠️
...t_expectation_trace/InjectExpectationTraceApi.java	81.81%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@                  Coverage Diff                  @@
##             release/current    #2945      +/-   ##
=====================================================
+ Coverage              40.14%   40.30%   +0.15%     
- Complexity              2177     2190      +13     
=====================================================
  Files                    660      661       +1     
  Lines                  20440    20500      +60     
  Branches                1394     1396       +2     
=====================================================
+ Hits                    8206     8262      +56     
- Misses                 11785    11787       +2     
- Partials                 449      451       +2     

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[antoinemzs]

Good stuff

good to know we have a schema constraint now :)