[nbsp1221]

Summary

• Implement Python tossinvest-openapi 0.1.0 MVP SDK with sync requests.Session transport.
• Add OAuth2 token management, response unwrapping, with_response=True, SDK error hierarchy, lifecycle handling, and all 20 Toss OpenAPI 1.1.1 business operations.
• Add Python tests, package metadata, docs, and build verification.
• Align Python get_orders with the OpenAPI/TypeScript contract by requiring status: Literal["OPEN", "CLOSED"].

QA

• mise run check
  • OpenAPI spec check passed: 1.1.1, 20 paths
  • TypeScript tests: 37 passed
  • Python tests: 23 passed
  • Python lint/typecheck/build passed
  • TypeScript lint/typecheck/build passed
• Real read-only API QA via /tmp/tossinvest-python-mvp-qa/run_readonly_qa.py
  • 22 passed, 0 failed, 0 skipped
  • Mutating order APIs were not called
• Wheel install/import QA
  • Built wheel installed into a /tmp virtualenv and imported successfully

Safety Notes

• Real API QA used credentials from local .env indirectly.
• No .env values, OAuth tokens, raw account numbers, raw account payloads, or portfolio values were written into repository files.
• Order creation, modification, and cancellation were intentionally deferred because they can change live account state.