Add per-client Makefiles for C, Python, and Go with:
- CLI mode: Tests --help, arg parsing, syntax validation
- Library mode: Unit tests, import verification
- Integration mode: API contract validation (with credentials)
- Functional mode: Real-world scenario tests
C client:
- 22 library tests (SHA-256, HMAC-SHA256, detect_language)
- Full unsandbox.c implementation with examples
Python client (sync + async):
- Delegates to sync/ and async/ subdirectories
- pytest-based test suites with coverage
- Examples for concurrent execution, streaming
Go client:
- Delegates to sync/ and async/ subdirectories
- go test integration with vet and fmt
Also update detect-changes.sh to detect changes in
both root-level un.* files AND clients/ directory.
Add complete async Python SDK implementation with all 13 API functions using aiohttp:
- execute_code: Execute code asynchronously
- execute_async: Start async code execution
- get_job: Get job status
- wait_for_job: Poll job with exponential backoff (async)
- cancel_job: Cancel running job
- list_jobs: List all jobs
- get_languages: Get supported languages (1-hour cache)
- detect_language: Detect language from filename extension
- session_snapshot: Create session snapshot (NEW)
- service_snapshot: Create service snapshot (NEW)
- list_snapshots: List all snapshots (NEW)
- restore_snapshot: Restore from snapshot (NEW)
- delete_snapshot: Delete snapshot (NEW)
Features:
- Full async/await support with aiohttp
- 4-tier credentials resolution
- HMAC-SHA256 authentication
- Exponential backoff polling with asyncio.sleep
- Languages cache (1-hour TTL)
- Type hints and comprehensive docstrings
