[frontend/backend] Show expectations traces (#564)

[johanah29]

Closes #564

[codecov]

Codecov Report

Attention: Patch coverage is 78.82353% with 18 lines in your changes missing coverage. Please review.

Project coverage is 40.59%. Comparing base (7ec815e) to head (7cd3522).
Report is 2 commits behind head on release/current.

Files with missing lines	Patch %	Lines
...va/io/openbas/rest/expectation/ExpectationApi.java	21.05%	14 Missing and 1 partial ⚠️
...openbas/service/InjectExpectationTraceService.java	84.21%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@                  Coverage Diff                  @@
##             release/current    #2598      +/-   ##
=====================================================
+ Coverage              40.44%   40.59%   +0.15%     
- Complexity              2068     2081      +13     
=====================================================
  Files                    635      638       +3     
  Lines                  19441    19518      +77     
  Branches                1323     1324       +1     
=====================================================
+ Hits                    7862     7924      +62     
- Misses                 11148    11161      +13     
- Partials                 431      433       +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[RomuDeuxfois]

todo: sourceId can't be null for the back-end. So we need to be aligned here.