Fix intrange and G101 linting issues

- Convert for loops to use Go 1.22+ integer ranges in generate.go and helpers.go
- Disable G101 false positives for test vectors and environment variable names
- Add file-level gosec disable for bip85_test.go containing BIP85 test vectors
- Add targeted nolint comments for legitimate test data and constants

internal/cli/init.go

@@ -33,7 +33,7 @@ func RunInit(cmd *cobra.Command, args []string) error {
 }
 
 // Init initializes the secret manager
-func (cli *CLIInstance) Init(cmd *cobra.Command) error {
+func (cli *Instance) Init(cmd *cobra.Command) error {
 	secret.Debug("Starting secret manager initialization")
 
 	// Create state directory