Expand test coverage for daemon components

[jeanmachuca]

What

Only 1 test file exists (298 lines) for a ~1700 line daemon. Untested packages:

• socket.go (Unix socket listener and protocol)
• handlers.go (message dispatch)
• mcp_lifecycle.go (MCP server spawn/discover/invoke/kill)
• audit.go (hardware audit loop)
• wide_client.go (HTTP client to inference engine)
• config.go (configuration parsing)

Why

The daemon is the core runtime component. Low coverage means high risk of regressions in state management, message routing, and MCP lifecycle.

How

• Add unit tests for each untested file
• Add an integration test that: starts the daemon, connects via Unix socket, sends messages, and verifies responses