feat: Complete unitree_sdk2_python_uv fork (uv managed, Python 3.10+)

[MiaoDX]

Context

Sub-issue of #74. The official unitree_sdk2_python hard-pins cyclonedds==0.10.2 which may lack binary wheels on newer Python versions. Our fork aims to fix this.

Current state

• Fork: MiaoDX-fork-and-pruning/unitree_sdk2_python_uv
• Upstream PR reference: Use fastcrc, instead of custom implementation, make modules proper python, and use prebuild cyclonedds unitreerobotics/unitree_sdk2_python#107 (fastcrc + prebuilt cyclonedds v0.10.5)

Tasks

• Migrate to uv-managed project structure (replace setup.py with pyproject.toml)
• Upgrade cyclonedds pin to prebuilt v0.10.5 (from carlosdp's approach)
• Verify installation on Python 3.10, 3.11, 3.12, 3.13
• Replace custom CRC with fastcrc
• Add __init__.py files for proper package structure
• CI pipeline for the fork (test on multiple Python versions)
• Clean commit history suitable for upstream PR

Why this matters

This is a prerequisite for #74 (full LeRobot integration via DDS) and for anyone using unitree_sdk2py on modern Python.

[MiaoDX]

Fork status analysis

Checked the current state of MiaoDX-fork-and-pruning/unitree_sdk2_python_uv against the checklist:

Task	Status	Notes
1. Migrate to uv/pyproject.toml	✅ Done	pyproject.toml exists (setuptools backend). setup.py still present — could be removed
2. Upgrade cyclonedds to 0.10.5	✅ Done	Vendored, built from source during install
3. Verify Python 3.10–3.13	❓ Unverified	No CI to confirm
4. Replace CRC with fastcrc	✅ Done	fastcrc >= 0.3.2 in dependencies
5. Add __init__.py files	❓ Unknown	unitree_sdk2py/ dir exists, unclear if sub-packages have them
6. CI pipeline	❌ Missing	No .github/workflows
7. Clean commit history	❓ Unknown	46 commits on master

Core work (1, 2, 4) is already done. Remaining items (CI, multi-version verification, history cleanup) are work in the fork repo, not in roboharness.

What was done in roboharness

Branch claude/issue-81-3JJJE adds only:

• unitree optional dependency group in pyproject.toml (unitree-sdk2py>=1.0.0)
• mypy ignore for unitree_sdk2py.*

This is the minimal groundwork for future LeRobot native sim integration (#74 / #83). No backend code was added — the SDK is needed for LeRobot's DDS-based sim architecture, not as a standalone roboharness backend.

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