fix(setup): run create_default_users with project venv and cwd

Step 8 used CWD-relative env/bin/python, so notebooks opened from a parent
directory could invoke the wrong interpreter (missing asyncpg). Use
project_root for the venv path, set subprocess cwd to project_root for
.env loading, and clarify manual recovery commands.

Made-with: Cursor

Author: shadeform

notebooks/setup/complete_setup_guide.ipynb

@@ -3391,11 +3391,11 @@
     "        print(f\"❌ Script not found: {script_path}\")\n",
     "        return False\n",
     "    \n",
-    "    # Determine Python path\n",
+    "    # Project venv (not CWD-relative — notebook may run from a parent directory)\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",
+    "        python_path = project_root / \"env\" / \"bin\" / \"python\"\n",
     "    \n",
     "    if not python_path.exists():\n",
     "        print(f\"❌ Python not found at: {python_path}\")\n",
@@ -3406,7 +3406,8 @@
     "    result = subprocess.run(\n",
     "        [str(python_path), str(script_path)],\n",
     "        capture_output=True,\n",
-    "        text=True\n",
+    "        text=True,\n",
+    "        cwd=str(project_root),\n",
     "    )\n",
     "    \n",
     "    if result.returncode == 0:\n",
@@ -3418,7 +3419,8 @@
     "    else:\n",
     "        print(f\"❌ Failed to create users: {result.stderr}\")\n",
     "        print(\"\\n💡 Try running manually:\")\n",
-    "        print(f\"   source env/bin/activate  # or env\\\\Scripts\\\\activate on Windows\")\n",
+    "        print(f\"   cd {project_root}\")\n",
+    "        print(\"   source env/bin/activate  # or env\\\\Scripts\\\\activate on Windows\")\n",
     "        print(f\"   python {script_path}\")\n",
     "        return False\n",
     "\n",