i4h Catheter Navigation - End-to-End Smoke

Purpose

Run a v0.7 smoke pipeline: verify setup, build a digital twin from a TotalSegmentator subject, render a DRR from cache, and run CPU unittests. Skips the interactive viewport (requires display).

Base Code

ROOT="${I4H_WORKFLOWS:-$(git rev-parse --show-toplevel 2>/dev/null)}"
if [ ! -d "$ROOT/workflows/catheter_navigation" ]; then
  ROOT="${I4H_WORKFLOWS:-$HOME/i4h-workflows}"
  [ -d "$ROOT/workflows/catheter_navigation" ] || git clone https://github.com/isaac-for-healthcare/i4h-workflows "$ROOT"
fi
export I4H_WORKFLOWS="$ROOT"; cd "$ROOT"

Basics