Restore real MCP configs and add stub-driven integration harnesses

[AchintyaAshok]

Summary

• restore mcp.test.json and persona test config to use published MCP servers rather than the stub harness
• teach the existing configuration and persona integration scripts to spin up temporary stub MCP configs/personas so tests stay offline without altering repo configs
• add a dedicated tool-alias routing integration script and expand the stub MCP server with request-info coverage used by the tests

Testing

• npx vitest run src/server/tools/toolset/loader.test.ts src/server/tools/toolset/validator.test.ts src/server/tools/toolset/manager.test.ts src/server/enhanced.test.ts --hookTimeout 15000
• bash src/test-utils/test-tool-alias-routing.sh
• bash src/test-utils/test-config-tools.sh
• bash src/test-utils/test-persona-toolset-activation.sh
• bash src/test-utils/test-active-toolset.sh

---

https://chatgpt.com/codex/tasks/task_b_68d96970f1188330abe2cec630960d21

[github-actions]

🤖 Changeset Status

⚠️ No changeset found - This PR will default to patch version when merged.

Is this the right version bump?

• 🐛 Bug fixes, small improvements → Automatic patch is perfect! ✅
• ✨ New features, API additions → Consider adding a minor changeset
• 💥 Breaking changes → Please add a major changeset

How to add a changeset:

1. Run npx changeset in your terminal
2. Select the appropriate version bump (patch/minor/major)
3. Write a short description of your changes
4. Commit the generated .changeset/*.md file

Skip release entirely:

Add [skip-ci] to your PR title if this shouldn't trigger any release.

---

This comment will update automatically when you push changes.