Fix Missing Class Exports in Wrapper Modules

[jeremymanning]

Missing class exports preventing test imports

Several wrapper and execution modules are missing class exports that test files expect:

Fixed:

• ✅ PipelineHeader - Added to foundation._compatibility
• ✅ BaseWrapperConfig - Added to wrapper_base.py

Still Missing:

• ❌ OperationMetrics from orchestrator.core.wrapper_monitoring
• ❌ WrapperHealthStatus from orchestrator.core.wrapper_monitoring
• ❌ Various other classes referenced in tests

Action Items:

1. Audit all wrapper/execution modules for missing exports
2. Add missing classes or create proper export aliases
3. Ensure test imports work for all modules
4. Update init.py files as needed

Related to Issue #351 (main test suite fix).

[jeremymanning]

No longer relevant after Claude Skills refactor (issue #426)