test : add unit tests for _fingerprint_score in finding_intelligence

[tmdeveloper007]

Summary of What Needs to be Done:
backend/secuscan/finding_intelligence.py contains the _fingerprint_score function which computes a deduplication fingerprint from a finding. The existing test files (test_finding_intelligence.py, test_finding_intelligence_asset_ref.py, test_finding_intelligence_dedupe.py, etc.) do not cover _fingerprint_score. This function is used for deduplication of findings.

Changes that Need to be Made:
Add tests to an appropriate existing test file (or new test_finding_intelligence_fingerprint.py) covering:

• Returns a tuple of (float score, str reason)
• Score is deterministic for same finding inputs
• Score changes when severity changes
• Score changes when asset_ref changes
• Score changes when target changes
• Empty/None finding fields are handled gracefully
• Different sources produce different scores

Impact that it would Provide:

• Coverage: adds tests for an untested deduplication helper
• Reliability: prevents fingerprint score computation regressions
• Complements existing dedupe tests (test_finding_intelligence_dedupe.py)

Note: This task is being handled by tmdeveloper007 — please assign to that account when picking it up.

[utksh1]

Hey @SathvikaSingoti, this issue matches your skills. Would you like to take it on? Comment below and I'll assign it to you once you accept the collaborator invite.

[SathvikaSingoti]

Hi @utksh1, sure! Happy to take this on, and I've also accepted the collaborator invite. I saw PR #1732 was closed as low-quality/template-generated, so I'll make sure this stays focused specifically on _fingerprint_score with meaningful, non-duplicated test cases.