Add Azure login instructions to CONFIGURATION_CHECKS.md; update section numbering for clarity

Author: devanshjainms

docs/CONFIGURATION_CHECKS.md

@@ -67,7 +67,22 @@ Ensure that the managed identity or service principal used by the controller vir
 1. "Reader" role to the user-assigned managed identity on the resource group containing the managed disks (if using Azure Managed Disks for SAP HANA data and log volumes).
 1. "Reader" role to the user-assigned managed identity on the resource group containing the shared disks (if using Azure Shared Disks for SBD devices).
 
-### 4. Test Execution
+### 4. Azure Login (required)
+
+Ensure that you are logged into Azure CLI on the controller VM with the appropriate subscription context:
+
+```bash
+# Login to Azure using System Assigned Managed Identity
+az login --identity
+
+# Login to Azure using User Assigned Managed Identity
+az login --identity -u <client-id-of-user-assigned-managed-identity>
+
+# Set the desired subscription context
+az account set --subscription <subscription-id>
+```
+
+### 5. Test Execution
 
 To execute the script, run following command:
 
@@ -91,7 +106,7 @@ To execute the script, run following command:
 ./scripts/sap_automation_qa.sh --extra-vars='{"configuration_test_type":"ApplicationInstances"}'
 ```
 
-### 5. Viewing Test Results
+### 6. Viewing Test Results
 
 After the test execution completes, a detailed HTML report is generated that summarizes the PASS/FAIL status of each test case and includes detailed execution logs for every step of the automation run.