Improve app loading process

[rehsfl]

Changes proposed in this pull request:

• Implement a loading bar in the frontend
• Optimize certain functions handling json files to reduce loading times
• Put in place a checksum verification to avoid validation of unchanged input files

Status

• READY
• HOLD
• WIP (Work-In-Progress)

How to verify this change

• Start vulnscout and ovserve the loading bar in the web dashboard, take note of processing time
• Stop and restart vulnscout with the same input files, notice the validation is skipped

Pull Request Checklist

Please review and check all that apply before submitting your PR:

• The code compiles and passes all tests
• All new and existing tests are passing
• Documentation has been updated (if applicable)
• Code follows project style guidelines
• No sensitive information is included
• Linked relevant issues (if any)
• Added necessary reviewers

[ValentinBoudevin]

I think it's weird to have "set_status" with a parameter progress to 0 for every task.

Should create two fonctions : set_status which set progress to 0 and update_progress to modify the progression

Or set a default parameter to 0 at set_status.

[rehsfl]

Progress value is an optional attribute. For example in Step 4: scanning spdx / cdx with Grype, we do not have a progress value at all.

You suggest to set progress to 0 inside set_status, which means we assume all tasks have a progress bar, which is not always true.

[ValentinBoudevin]

So you have a single function that handles lossing bar creation/or not and used to modify the value of the progress.
Maybe create multiples fonctions (init_loading_bar, set_loading_value). Would be better?

[rehsfl]

We use the same function to set status, it's simply a value that is appended to the status.txt each time the event / progression changes. There is no need to create additional functions and possibly other temporary file to only handle progress bar

[ValentinBoudevin]

Step 7/7 : Exporting CycloneDX file

I don't use a CycloneDX file (with SPDX3 example). I should not have this message displayed

[ValentinBoudevin]

TO BE MERGE AFTER v0.8.1