Good first issue: add Python SDK (mirrors TypeScript SDK)

[pshkv]

What

Create a Python gateway client SDK at sdks/python/ that mirrors the TypeScript SDK in sdks/typescript/.

Why

Many robotics environments use Python (ROS 2 Python bindings, MAVLink pymavlink). A native Python SDK removes the need for subprocess calls to the TypeScript client.

Spec

The SDK should expose the same operations as sdks/typescript/src/index.ts:

• intercept(request) → PolicyDecision
• issueToken(params) → SintCapabilityToken
• revokeToken(tokenId)
• getLedger(filters) → events
• pendingApprovals() → list
• resolveApproval(requestId, approved)
• delegateToken(parentTokenId, params) → token

Use httpx (async) with a 10s timeout default. Raise SintError(status_code, code, message) on non-2xx.

Reference

TypeScript SDK: sdks/typescript/src/index.ts
TypeScript SDK tests: sdks/typescript/src/__tests__/client.test.ts

The Python SDK should have matching tests using pytest-httpx to mock the gateway.

Files to create

sdks/python/
  pyproject.toml         # name: sint-sdk, requires: httpx>=0.27
  sint/
    __init__.py
    client.py            # SintClient class
    errors.py            # SintError
    types.py             # TypedDict definitions
  tests/
    test_client.py
  README.md

Acceptance criteria

• All TypeScript SDK operations have Python equivalents
• Tests pass with pytest
• Type annotations throughout (mypy --strict)

[sakshar2303]

Hi , can you please assign this issue to me ?