fix(setup): run Step 9 demo scripts with project venv and cwd

Same issue as Step 8: CWD-relative env/bin/python missed deps (psycopg,
asyncpg). Use get_project_root(), project_root/env Python, absolute script
paths, cwd=project_root; optional get_project_root fallback if Step 2/8
not run.

Made-with: Cursor

Author: shadeform

notebooks/setup/complete_setup_guide.ipynb

@@ -3524,44 +3524,96 @@
     "import sys\n",
     "from pathlib import Path\n",
     "\n",
+    "if \"get_project_root\" not in globals():\n",
+    "    NOTEBOOK_FILENAME = \"complete_setup_guide.ipynb\"\n",
+    "    PROJECT_ROOT_MARKERS = ((\"src\", \"api\"), (\"scripts\", \"setup\"))\n",
+    "    NOTEBOOK_SETUP_DIR = \"setup\"\n",
+    "    NOTEBOOKS_DIR = \"notebooks\"\n",
+    "\n",
+    "    def _has_markers(path: Path) -> bool:\n",
+    "        return (\n",
+    "            (path / PROJECT_ROOT_MARKERS[0][0] / PROJECT_ROOT_MARKERS[0][1]).exists()\n",
+    "            and (path / PROJECT_ROOT_MARKERS[1][0] / PROJECT_ROOT_MARKERS[1][1]).exists()\n",
+    "        )\n",
+    "\n",
+    "    def get_project_root():\n",
+    "        \"\"\"Detect repo root (same rules as Step 2) if that cell was not run.\"\"\"\n",
+    "        import builtins\n",
+    "        import os\n",
+    "\n",
+    "        if hasattr(builtins, \"__project_root__\"):\n",
+    "            cached = Path(builtins.__project_root__)\n",
+    "            if _has_markers(cached):\n",
+    "                return cached\n",
+    "            del builtins.__project_root__\n",
+    "\n",
+    "        current = Path.cwd()\n",
+    "        if _has_markers(current):\n",
+    "            project_root = current\n",
+    "        elif current.name == NOTEBOOK_SETUP_DIR and current.parent.name == NOTEBOOKS_DIR:\n",
+    "            project_root = current.parent.parent\n",
+    "        elif current.name == NOTEBOOKS_DIR:\n",
+    "            project_root = current.parent\n",
+    "        else:\n",
+    "            project_root = current\n",
+    "            for parent in current.parents:\n",
+    "                if _has_markers(parent):\n",
+    "                    project_root = parent\n",
+    "                    break\n",
+    "\n",
+    "        if not _has_markers(project_root):\n",
+    "            try:\n",
+    "                for child in sorted(current.iterdir(), key=lambda p: p.name.lower()):\n",
+    "                    if child.is_dir() and _has_markers(child):\n",
+    "                        project_root = child\n",
+    "                        break\n",
+    "            except (OSError, PermissionError):\n",
+    "                pass\n",
+    "\n",
+    "        os.chdir(project_root)\n",
+    "        builtins.__project_root__ = project_root\n",
+    "        return project_root\n",
+    "\n",
     "def generate_demo_data():\n",
     "    \"\"\"Generate demo data for testing.\"\"\"\n",
     "    print(\"📊 Generating Demo Data\")\n",
     "    print(\"=\" * 60)\n",
-    "    \n",
-    "    # Determine Python path\n",
+    "\n",
+    "    project_root = get_project_root()\n",
     "    if sys.platform == \"win32\":\n",
-    "        python_path = Path(\"env\") / \"Scripts\" / \"python.exe\"\n",
+    "        python_path = project_root / \"env\" / \"Scripts\" / \"python.exe\"\n",
     "    else:\n",
-    "        python_path = Path(\"env\") / \"bin\" / \"python\"\n",
-    "    \n",
+    "        python_path = project_root / \"env\" / \"bin\" / \"python\"\n",
+    "\n",
     "    if not python_path.exists():\n",
     "        print(f\"❌ Python not found at: {python_path}\")\n",
+    "        print(\"   Make sure virtual environment is set up (Step 3)\")\n",
     "        return False\n",
-    "    \n",
+    "\n",
     "    scripts = [\n",
     "        (\"scripts/data/quick_demo_data.py\", \"Quick demo data (equipment, inventory)\"),\n",
     "        (\"scripts/data/generate_historical_demand.py\", \"Historical demand data (for forecasting)\"),\n",
     "    ]\n",
-    "    \n",
-    "    for script_path, description in scripts:\n",
-    "        script = Path(script_path)\n",
+    "\n",
+    "    for script_rel, description in scripts:\n",
+    "        script = project_root / script_rel\n",
     "        if not script.exists():\n",
-    "            print(f\"⚠️  Script not found: {script_path} (skipping)\")\n",
+    "            print(f\"⚠️  Script not found: {script} (skipping)\")\n",
     "            continue\n",
-    "        \n",
+    "\n",
     "        print(f\"\\n🔄 {description}...\")\n",
     "        result = subprocess.run(\n",
     "            [str(python_path), str(script)],\n",
     "            capture_output=True,\n",
-    "            text=True\n",
+    "            text=True,\n",
+    "            cwd=str(project_root),\n",
     "        )\n",
-    "        \n",
+    "\n",
     "        if result.returncode == 0:\n",
     "            print(f\"✅ {description} generated\")\n",
     "        else:\n",
     "            print(f\"⚠️  {description} had issues: {result.stderr[:200]}\")\n",
-    "    \n",
+    "\n",
     "    print(\"\\n\" + \"=\" * 60)\n",
     "    print(\"✅ Demo data generation complete!\")\n",
     "    print(\"\\n💡 You can skip this step if you don't need demo data.\")\n",