Implement tool alias routing and stub MCP servers for tests

[AchintyaAshok]

Summary

• implement alias metadata across toolset types, validation, manager, and config tooling so aliases remain stable and route back to canonical tools
• add a local stub MCP server harness and point test configs/personas at it to support offline integration coverage
• expand unit and integration tests (including enhanced server routing) to cover alias flows and stubbed tool availability

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-config-tools.sh
• bash src/test-utils/test-active-toolset.sh
• bash src/test-utils/test-persona-toolset-activation.sh

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

[github-actions]

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