Hotfix: MCP protocol handshake
Fixes the MCP server failing to connect to Claude Code (and other MCP clients).
Bug: protocolVersion in the initialize response was returned as a nested object {"version":"2024-11-05"} instead of the plain string "2024-11-05" required by the MCP specification. Claude Code rejected the malformed response and marked the server as failed.
Fix: One-line change — protocolVersion is now a plain string value.
Upgrading from v0.5.0
```bash
codebase-memory-mcp update
```
All other v0.5.0 features (Go-to-C rewrite, 8-agent install, UI, auto-index, update check) are unchanged.