Standardize notebook table-relationship documentation cells

spatial_clustering_master_data_centers.ipynb

@@ -1116,6 +1116,27 @@
     "else:\n",
     "    print('WRITE_BACK_TO_DB is False; no database table was modified.')"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "32",
+   "metadata": {},
+   "source": [
+    "## Tables Created by This Notebook and Their Relationships\n",
+    "\n",
+    "### Tables Created / Maintained\n",
+    "1. `public.master_data_center_spatial_clusters` (optional write)\n",
+    "- One row per `master_id` with cluster label and clustering metadata.\n",
+    "- Written only when `WRITE_BACK_TO_DB = True`.\n",
+    "\n",
+    "### Key Relationships\n",
+    "- `public.master_data_centers (master_id)`\n",
+    "  - 1-to-1 (effective) -> `public.master_data_center_spatial_clusters (master_id)`\n",
+    "\n",
+    "### Rerun Notes\n",
+    "- Default behavior (`WRITE_BACK_TO_DB = False`) performs no table writes.\n",
+    "- With write-back enabled, reruns replace cluster assignments using the current parameters/data."
+   ]
   }
  ],
  "metadata": {