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/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