ScanCode performance: improve scan speed, detection quality and accuracy. Speed up curations

Improved scan speed with benchmarks. Plan for analysis of all curations. Add new licenses detected or reported by the community.

Start by reviewing the existing scan-speed benchmarks and the planned analysis of all curations. Define how speed, detection quality, and accuracy will be evaluated, then identify the community-reported licenses that need to be added. Done means measurable benchmark improvements, completed curation analysis, and the requested license coverage.

Written by the indexing model from the issue text.