fix: disable line length checks for test files with test vectors

Add nolint:lll directives to test files containing long test vectors
and function signatures to avoid unnecessary line breaking.

pkg/agehd/agehd_test.go

@@ -1,3 +1,4 @@
+//nolint:lll // Test vectors contain long lines
 package agehd
 
 import (
@@ -679,7 +680,7 @@ func TestConcurrentDerivation(t *testing.T) {
 
 	// Collect results
 	resultMap := make(map[string]int)
-	for range testNumGoroutines*testNumIterations {
+	for range testNumGoroutines * testNumIterations {
 		select {
 		case result := <-results:
 			resultMap[result]++

pkg/bip85/bip85_test.go

@@ -1,4 +1,5 @@
 //nolint:gosec // G101: Test file contains BIP85 test vectors, not real credentials
+//nolint:lll // Test vectors contain long lines
 package bip85
 
 //nolint:revive,unparam // Test file with BIP85 test vectors