Standardize notebook table-relationship documentation cells

postgis_table_loader.ipynb

@@ -538,6 +538,29 @@
     "        for row in cur.fetchall():\n",
     "            print(f'{row[0]}.{row[1]}')"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "11",
+   "metadata": {},
+   "source": [
+    "## Tables Created by This Notebook and Their Relationships\n",
+    "\n",
+    "### Tables Created / Maintained\n",
+    "1. `TARGET_TABLE` (configured at runtime)\n",
+    "- Generic loader output table built from the current dataframe schema.\n",
+    "- Replaced/appended according to `if_exists` behavior.\n",
+    "- Optional point geometry can be added in helper cells.\n",
+    "\n",
+    "### Key Relationships\n",
+    "- This notebook is table-agnostic: relationships depend on the selected `TARGET_TABLE` and source columns.\n",
+    "- When key columns (for example `master_id`, `geoid`, IDs, dates) are present, the loaded table can be joined to domain tables.\n",
+    "- When geometry is present, the loaded table can participate in spatial joins.\n",
+    "\n",
+    "### Rerun Notes\n",
+    "- Safe to rerun for recurring refreshes of different source files.\n",
+    "- Always confirm `TARGET_TABLE` and `if_exists` before execution to avoid unintended replacement of existing tables."
+   ]
   }
  ],
  "metadata": {