chore: Add SLURM_EMAIL check and notification to slurm_train.sl

The `slurm_train.sl` script has been updated to include a check for the `SLURM_EMAIL` environment variable. If the variable is not set, a message is displayed prompting the user to set it before running the script. Additionally, email notification options have been added to the script using the `SBATCH --mail-user` and `SBATCH --mail-type` directives. This change improves the usability of the script by ensuring that the user is notified of job completion or failure via email.

SLURM/slurm_train.sl

@@ -10,7 +10,17 @@
 #SBATCH --cpus-per-task=64
 # Request GPU Ressources (model:number)
 #SBATCH --gpus=a100:1
-
+
+# Check if SLURM_EMAIL is set
+if [ -z "$SLURM_EMAIL" ]; then
+  echo "SLURM_EMAIL is not set. Please set it before running the script."
+else
+  # Add email notification
+  #SBATCH --mail-user=$SLURM_EMAIL
+  #SBATCH --mail-type=END,FAIL
+  echo "SLURM_EMAIL is set to $SLURM_EMAIL"
+fi
+
 # Clear all interactively loaded modules
 module purge