Fix Python 3.10 unified CLI imports

[skywhite1024]

Description

Restore the unified embodichain CLI on Python 3.10 by falling back to importlib.abc.Traversable when importlib.resources.abc is unavailable.

Commit 1352f988 introduced the Python 3.11+ import path while the project still declares requires-python = ">=3.10". On Python 3.10, every python -m embodichain ... command failed during module import before subcommand dispatch. Python 3.11+ keeps using the existing resource import path.

Dependencies: none.

Issue: none.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Enhancement (non-breaking change which improves existing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (existing functionality will not work without user modification)
• Documentation update

Screenshots

Not applicable; this is a CLI import compatibility fix.

Validation

• conda run -n embodichain040 black --check --diff --color ./ (811 files unchanged)
• python docs/scripts/check_api_docs.py (1714/1714 exports documented)
• Python 3.10.20: python -m embodichain --help
• Python 3.10.20: python -m embodichain preview-asset --help
• Python 3.10.20: pytest tests/test_main.py -q (11 passed)
• git diff --check

Checklist

• I have run the Black formatting gate.
• Documentation changes are not required for this compatibility fix.
• Public API documentation coverage is aligned.
• Existing CLI tests prove the fix under Python 3.10.
• Dependencies have not changed.

[Copilot]

Pull request overview

This pull request restores compatibility of the unified python -m embodichain ... CLI on Python 3.10 by conditionally importing Traversable from the appropriate stdlib location, preventing import-time failure before subcommand dispatch.

Changes:

• Add a try/except import fallback for Traversable to support Python 3.10 when importlib.resources.abc is unavailable.
• Preserve the existing Python 3.11+ import path for Traversable when available.

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.

[greptile-apps]

Greptile Summary

Restores unified CLI imports on Python 3.10 while preserving the existing Python 3.11+ path.

• Adds a ModuleNotFoundError fallback from importlib.resources.abc.Traversable to importlib.abc.Traversable.
• Introduces no dependency or runtime behavior changes beyond import compatibility.

Confidence Score: 5/5

The PR appears safe to merge with no actionable correctness, compatibility, or security issues identified.

The fallback catches the Python 3.10 missing-module condition and resolves the equivalent standard-library type, while Python 3.11 and later retain the existing import path.

Important Files Changed

Filename	Overview
embodichain/main.py	Adds a correct version-compatible Traversable import fallback; no actionable defects were identified.

_{Reviews (1): Last reviewed commit: "fix(cli): support Python 3.10 resource i..." | Re-trigger Greptile}