## pass_state.py

Complete Pass state implementation with:

1. Input/output/result path processing
2. Static result injection via Result field
3. Dynamic data via Parameters field
4. Validation preventing both Result and Parameters
5. Full async execution support

### Comprehensive test suite with 32 tests:

* ✅ Initialization tests
* ✅ Validation tests (valid and invalid configs)
* ✅ Execution tests with various path combinations
* ✅ Result and Parameters handling
* ✅ Error handling and edge cases
* ✅ JSON serialization tests
* ✅ Integration with real processors
* ✅ Concurrent execution tests
