Add comprehensive conformance test for SEP-1034 which extends MCP
elicitation to support default values across all primitive types.
Changes:
- Add test_elicitation_sep1034_defaults tool to reference server
- Create ElicitationDefaultsScenario with 5 granular checks:
* String schema default value
* Integer schema default value
* Number schema default value
* Enum schema default value (validates it's a valid enum member)
* Boolean schema default value (regression test)
- Register scenario in index.ts
The test validates that servers properly include default values in
elicitation requestedSchema per SEP-1034 specification.
Test results: All 5 checks pass against TypeScript reference server