[backend] Include payload tags in scenario export bundle (#3641)

[antoinemzs]

Proposed changes

• Include payload tags in scenario export bundle

Testing Instructions

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

Related issues

• Related Import scenario from XTM Hub leads to NPE exceptions #3641
• Closes Scenario export function does not include payload tags #3645

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 90.90909% with 1 line in your changes missing coverage. Please review.

Project coverage is 44.83%. Comparing base (35d2624) to head (e194406).
Report is 5 commits behind head on release/current.

Files with missing lines	Patch %	Lines
.../main/java/io/openbas/service/ScenarioService.java	90.90%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@                  Coverage Diff                  @@
##             release/current    #3647      +/-   ##
=====================================================
+ Coverage              44.40%   44.83%   +0.42%     
- Complexity              2799     2805       +6     
=====================================================
  Files                    762      762              
  Lines                  23138    23147       +9     
  Branches                1610     1610              
=====================================================
+ Hits                   10274    10377     +103     
+ Misses                 12289    12186     -103     
- Partials                 575      584       +9     

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