fix: resolve gosec integer overflow and unconvert issues

- Fix G115 integer overflow by converting uint32 to int comparison
- Remove unnecessary int() conversions for syscall constants
- syscall.Stdin/Stderr/Stdout are already int type

pkg/bip85/bip85.go

@@ -308,7 +308,7 @@ func DeriveBase64Password(masterKey *hdkeychain.ExtendedKey, pwdLen, index uint3
 	encodedStr = strings.TrimRight(encodedStr, "=")
 
 	// Slice to the desired password length
-	if uint32(len(encodedStr)) < pwdLen {
+	if len(encodedStr) < int(pwdLen) {
 		return "", fmt.Errorf("derived password length %d is shorter than requested length %d", len(encodedStr), pwdLen)
 	}
 
@@ -332,7 +332,7 @@ func DeriveBase85Password(masterKey *hdkeychain.ExtendedKey, pwdLen, index uint3
 	encoded := encodeBase85WithRFC1924Charset(entropy)
 
 	// Slice to the desired password length
-	if uint32(len(encoded)) < pwdLen {
+	if len(encoded) < int(pwdLen) {
 		return "", fmt.Errorf("encoded length %d is less than requested length %d", len(encoded), pwdLen)
 	}