[backend] Batching injects

[Dimfacion]

Proposed changes

• Batching came back from the dead to haunt us

Testing Instructions

1. Step-by-step how to test
2. Environment or config notes

Related issues

• Closes [backend] Fix on batching execution traces #3270

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

Further comments

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc...

[codecov]

Codecov Report

❌ Patch coverage is 27.72586% with 232 lines in your changes missing coverage. Please review.
✅ Project coverage is 46.36%. Comparing base (23b393d) to head (3dbb8b2).
⚠️ Report is 2 commits behind head on release/current.

Files with missing lines	Patch %	Lines
...st/inject/service/BatchingInjectStatusService.java	0.75%	131 Missing ⚠️
...o/openbas/rest/helper/queue/BatchQueueService.java	46.37%	70 Missing and 4 partials ⚠️
...as/rest/inject/service/InjectExecutionService.java	0.00%	11 Missing ⚠️
...rc/main/java/io/openbas/rest/inject/InjectApi.java	30.76%	9 Missing ⚠️
...nbas/rest/inject/form/InjectExecutionCallback.java	0.00%	3 Missing ⚠️
...er/queue/executor/BatchExecutionTraceExecutor.java	0.00%	2 Missing ⚠️
.../openbas/config/ThreadPoolTaskSchedulerConfig.java	66.66%	1 Missing ⚠️
...a/io/openbas/service/InjectExpectationService.java	90.90%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@                  Coverage Diff                  @@
##             release/current    #3990      +/-   ##
=====================================================
- Coverage              46.55%   46.36%   -0.19%     
- Complexity              3120     3153      +33     
=====================================================
  Files                    828      835       +7     
  Lines                  24709    25623     +914     
  Branches                1792     1908     +116     
=====================================================
+ Hits                   11503    11880     +377     
- Misses                 12526    13072     +546     
+ Partials                 680      671       -9     

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