fix(Rest): Add vulnerability count number to project detail tabs.

[nikkuma7]

Please provide a summary of your changes here.

• Which issue is this pull request belonging to and how is it solving it? (Refer to issue here)
• Did you add or update any new dependencies that are required for your change?

Issue: Close ##4025

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How To Test?

Url: Get : http://localhost:8080/resource/api/projects/{ID}/vulnerabilitiesCount

1: Navigate to the Project detail page.
2: Look at the left sidebar — find the "Vulnerabilities" tab item.
3: Verify a vulnerability number is visible next to the label showing.

6: Click the Vulnerabilities tab and verify the content still loads correctly.
7: Test with a project that has no vulnerabilities — badge should show 0 / 0 in red.

How should these changes be tested by the reviewer?
Have you implemented any additional tests?

Checklist

Must:

• All related issues are referenced in commit messages and in PR

[deo002]

We need an endpoint for all metric data in the project sidebar