adding some validation for gcloud beta and instance exits

Makefile

@@ -382,7 +382,27 @@ dataconnect-sync:
 # This should only be executed when setting up a brand new environment
 # (e.g., first-time dev setup or new GCP project).
 # -------------------------------------------------------------------
-dataconnect-bootstrap-db:
+
+# Comprueba que gcloud y el grupo beta están disponibles
+check-gcloud-beta:
+	@command -v gcloud >/dev/null 2>&1 || { \
+		echo "❌ gcloud CLI not found. Please install it: https://cloud.google.com/sdk/docs/install"; \
+		exit 1; \
+	}
+	@gcloud beta --help >/dev/null 2>&1 || { \
+		echo "❌ 'gcloud beta' is not available. Run 'gcloud components update' or reinstall the SDK."; \
+		exit 1; \
+	}
+	@echo "✅ gcloud CLI and 'gcloud beta' are available."
+
+dataconnect-bootstrap-db: check-gcloud-beta
+	@echo "🔍 Checking if Cloud SQL instance krow-sql already exists in [$(GCP_PROJECT_ID)]..."
+	@if gcloud sql instances describe krow-sql --project=$(GCP_PROJECT_ID) >/dev/null 2>&1; then \
+		echo "⚠️ Cloud SQL instance 'krow-sql' already exists in project $(GCP_PROJECT_ID)."; \
+		echo "   If you really need to recreate it, delete the instance manually first."; \
+		exit 1; \
+	fi
+	
 	@echo "⚠️  Creating Cloud SQL instance krow-sql (tier: $(SQL_TIER)) (ONLY RUN THIS ONCE PER PROJECT)..."
 	gcloud sql instances create krow-sql \
 		--database-version=POSTGRES_15 \