fix: Remove unnecessary f-string prefix in vulnrichment.py

[samay2504]

Summary

The file vulnerabilities/importers/vulnrichment.py contains an f-string without any placeholders at line 32, which violates ruff rule F541.

Problem

Using f"..." syntax without any {variable} placeholders inside is:

• Unnecessary overhead (f-strings are marginally slower than regular strings)
• Misleading to readers who expect interpolation
• A code quality issue flagged by linters

Location

File: vulnerabilities/importers/vulnrichment.py
Line: 32
Current code:

for file_path in base_path.glob(f"**/**/*.json"):