Fuzz and Test the go-mfp CPython Binding

The go-mfp cpython package is a unique Go library that embeds CPython as a scripting engine, supporting multiple isolated sub-interpreters with automatic garbage collection of Python objects. As this package is planned to move into a standalone repository and potentially become critical Linux infrastructure, ensuring correctness and security across Python 3.8 through the latest version is essential. This project will build a comprehensive unit test and fuzz test suite — pairing each source file with _test.go and _fuzz_test.go files using Go's native fuzzing framework, tested across Python 3.8–latest on both x86 and ARM64. Deliverables: - Full unit test suite for all public API functions - Fuzz harnesses for sub-interpreter lifecycle, object GC, type conversions, and error handling - CI matrix builds across Python versions and architectures - Documentation for running and extending the test suite