golangci-lint's max-same-issues:3 truncated the CI display to 3 of 6 Mul64
sites; v0.5.2 fixed the 3 shown, these are the 3 suppressed ones. All safemath
Mul64/Add64 now use the generic math.Mul/Add. CI lint job now clean (the 3
residual staticcheck findings are Go-1.26 crypto-coordinate deprecations in
secp256r1fx/keychain.go that golangci-lint v2.1.6 does not flag; crypto/ecdh
refactor tracked separately). 11/11 packages pass.
Co-authored-by: Hanzo Dev <dev@hanzo.ai>