fix(devcontainer): clear root-owned __pycache__ before uv sync on attach
_pycache_ dirs created by root (during image build or prior root Python runs) cause permission errors when juice-data runs uv sync on attach. Wipe them with sudo before syncing so the attach never fails on stale pycache ownership.
Closes #381 (closed)
Co-Authored-By: Claude Sonnet 4.6 noreply@anthropic.com