[backend] Fix issue Int cannot represent 32-bit signed integer

[helene-nguyen]

Proposed changes

• Use the Float type instead of Int

Related issues

• https://github.com/OpenCTI-Platform/opencti/issues/7460

Checklist

• [x] I consider the submitted work as finished
• [ ] I tested the code for its functionality
• [ ] I wrote test cases for the relevant uses case (coverage and e2e)
• [ ] I added/update the relevant documentation (either on github or on notion)
• [ ] Where necessary I refactored code to improve the overall quality

Further comments

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 67.38%. Comparing base (82804ed) to head (20e41af). Report is 3 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #7462 +/- ## ========================================== + Coverage 67.36% 67.38% +0.01% ========================================== Files 563 563 Lines 69623 69626 +3 Branches 5885 5893 +8 ========================================== + Hits 46902 46916 +14 + Misses 22721 22710 -11 ```

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