fix: migrate findings/run_count/total_findings from u32 to u64#605

EffortlessSteven wants to merge 2 commits intomainEffortlessMetrics/diffguard:mainfrom

feat/work-b00574c1/diffguard-analytics-lib.rs-228-281-usiz-truncatEffortlessMetrics/diffguard:feat/work-b00574c1/diffguard-analytics-lib.rs-228-281-usiz-truncatCopy head branch name to clipboard