[Feature] Add LicenseDB as source option in LicsImporter

[ADITYA-CODE-SOURCE]

Description

Update LicsImporter to support fetching licenses from LicenseDB instead of only CSV files

Current Behavior

LicsImporter only reads from CSV files. There is no option to fetch from LicenseDB.

Expected Behavior

Add a flag/option to use LicenseDB as the source:

• Add parameter useLicenseDB to importLics() method
• When enabled, fetch licenses from LicenseDB instead of CSV
• Add deprecation notice to CSV-based import

Why This is Needed

As per GSoC 2026 project requirements, existing CLI workflows should be updated to use LicenseDB as the source instead of manual file imports.

Versions

• Last commit id on main: 18c916a