Replace all os.Setenv calls with t.Setenv in test functions to ensure
proper test environment cleanup and better test isolation. This leaves
only legitimate application code and helper functions using os.Setenv.
- 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
- Remove sensitive data from debug logs (vault/secrets.go, secret/version.go)
- Add input validation for GPG key IDs and keychain item names
- Resolve GPG key IDs to full fingerprints before storing in metadata
- Add comprehensive test coverage for validation functions
- Add golangci-lint configuration with additional linters
Security improvements:
- Debug logs no longer expose decrypted secret values or private keys
- GPG and keychain commands now validate input to prevent injection attacks
- All validation uses precompiled regex patterns for performance
