feat: complete reports tokens spent + saved (0.24.0) #168

Job	Run time
criterion benches (compile only)	36s
cargo-audit (security advisories)	2m 59s
coverage (llvm-cov)	37s
test (ubuntu-latest)	4m 57s
test (windows-latest)	6m 53s
msrv (rust 1.88)	5m 14s
test (macos-latest)	3m 31s
	24m 47s

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