fix: normalize the npm executable path

[ECD5A]

Summary

• normalize the orchestrui-mcp bin path for npm 11
• verify the package manifest points to the built MCP server
• verify the built executable retains its portable Node.js shebang
• document the fix in the pending 0.3.0 release

Verification

• npm run check
• npm run benchmark — 50/50 + 8/8
• npm publish --dry-run --ignore-scripts — clean, no normalization warning