Change WriteFile permissions from 0o644 to 0o600 to address security
linting issue about file permissions being too permissive.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
Remove unused tempDir parameter from test11ListSecrets and test15VaultIsolation
Remove unused runSecretWithStdin parameter from test17ImportFromFile
Update call sites to match new signatures
- 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
