[backend] Define a logic for saving structured outputs

[savacano28]

Proposed changes

• Add a new attribute to execution traces to save structured results (calculated from existing output parsers).
• Refact to calculate structured output when an output parser has been defined.
• Refact the compute of findings to use structured output as input instead of raw output.

Testing Instructions

1. Create a payload with a output parser
   Exemple PortScan: (TCP|UDP)\s+([\d.[]:]+):(\d+)\s+([\d.[]:]+):(\d+|*)\s+(\S+) {host:$2, port: $3, service: $6}
   

2. Execute an inject with this paylaod

3. Verify in DDBB if there is any trace with a value in the column: structured_message (with the output parser structure)
   

4. If you have enabled findings, verify if any find was created

Related issues

• Closes Define a logic for saving structured outputs #3179

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

Attention: Patch coverage is 54.82234% with 89 lines in your changes missing coverage. Please review.

Project coverage is 42.41%. Comparing base (5ce39fd) to head (a1ce60c).

Files with missing lines	Patch %	Lines
...n/java/io/openbas/rest/finding/FindingService.java	0.00%	37 Missing ⚠️
...bas/rest/inject/service/StructuredOutputUtils.java	71.55%	22 Missing and 9 partials ⚠️
...as/rest/inject/service/InjectExecutionService.java	47.36%	18 Missing and 2 partials ⚠️
...ain/java/io/openbas/rest/injector/InjectorApi.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                  Coverage Diff                  @@
##             release/current    #3162      +/-   ##
=====================================================
+ Coverage              42.27%   42.41%   +0.14%     
- Complexity              2484     2505      +21     
=====================================================
  Files                    704      707       +3     
  Lines                  21800    21843      +43     
  Branches                1483     1497      +14     
=====================================================
+ Hits                    9215     9265      +50     
+ Misses                 12077    12064      -13     
- Partials                 508      514       +6     

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[MarineLeM]

Test : ok

[Dimfacion]

To help understand what is done in this PR and improve readability, do you think you could add more comments and/or javadocs ?

[Dimfacion]

I noticed that when no value is saved in execution_structured_output it's saved as the text 'null' instead of the null value. You can see the difference between value that were saved before the migration and new ones

Still OK with the PR but I'm wondering if we should merge it now or after the next release