Keep confident suggestions
IMPORTANT: this commit introduces a default confidence score threshold that wipes out roughly 80% of total suggestions.
You can pass the optional -s / --score
CLI arg to override such an aggressive behavior.
The default value is based on the Average scores per confidence rating graph at https://docs.google.com/spreadsheets/d/1LUInOc-gZeJpTOiTYsjuovspazHCPSccuJZzy8WOhOg/edit?usp=sharing, which shows a correlation between human ratings and dataset scores.
See also https://phabricator.wikimedia.org/T330784.
Bug: T336080