Add CatBoost dependency and update lock file

- Added CatBoost version 1.2.8 to the project dependencies in pyproject.toml.
- Updated uv.lock to include CatBoost and its dependencies, along with the necessary wheel files.
- Included Graphviz version 0.21 in the lock file as a dependency for CatBoost.

M2/Machine Learning/TP_4/2025_M2_ISF_TP_4.ipynb

@@ -45,7 +45,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 102,
+   "execution_count": null,
    "id": "97d58527",
    "metadata": {},
    "outputs": [],
@@ -70,7 +70,6 @@
     "from sklearn.ensemble import GradientBoostingClassifier\n",
     "from sklearn.model_selection import (\n",
     "  GridSearchCV,\n",
-    "  KFold,\n",
     "  StratifiedKFold,\n",
     "  cross_val_score,\n",
     "  train_test_split,\n",
@@ -17781,7 +17780,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 121,
+   "execution_count": null,
    "id": "cb60fe19",
    "metadata": {},
    "outputs": [],
@@ -17793,10 +17792,7 @@
     "}\n",
     "\n",
     "# Nombre de folds pour la validation croisée\n",
-    "num_folds = 5\n",
-    "\n",
-    "# Initialisation du modèle GradientBoostingClassifier\n",
-    "gb = GradientBoostingClassifier(random_state=42)"
+    "num_folds = 5"
    ]
   },
   {