- GetRawCredentials resolves credentials: device transit, device legacy, profile transit, profile legacy
- Cache key includes source (device/profile) to prevent cross-source poisoning
- GetCredentials is now a backward-compatible wrapper calling GetRawCredentials + ParseRouterOSCredentials
- Add DecryptRaw to device package for raw byte decryption without JSON parsing
- Invalidate clears both parsed and raw cache entries
- All existing callers (PollDevice, CmdResponder, TunnelResponder, BackupResponder, SSHRelay) unchanged
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>