Fix nil pointer dereference in longTermRetentionPolicy

Extract weeklyRetention, monthlyRetention, and yearlyRetention into
local variables inside the policy.Properties nil guard. Previously
these fields were accessed directly on policy.Properties in the
CreateResource call, which would panic if Properties was nil.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: tas50

providers/azure/resources/sql.go

@@ -844,16 +844,22 @@ func (a *mqlAzureSubscriptionSqlServiceDatabase) longTermRetentionPolicy() (*mql
 	}
 
 	var weekOfYear int64
-	if policy.Properties != nil && policy.Properties.WeekOfYear != nil {
-		weekOfYear = int64(*policy.Properties.WeekOfYear)
+	var weeklyRetention, monthlyRetention, yearlyRetention *string
+	if policy.Properties != nil {
+		weeklyRetention = policy.Properties.WeeklyRetention
+		monthlyRetention = policy.Properties.MonthlyRetention
+		yearlyRetention = policy.Properties.YearlyRetention
+		if policy.Properties.WeekOfYear != nil {
+			weekOfYear = int64(*policy.Properties.WeekOfYear)
+		}
 	}
 
 	res, err := CreateResource(a.MqlRuntime, "azure.subscription.sqlService.database.longtermretentionpolicy",
 		map[string]*llx.RawData{
 			"id":               llx.StringDataPtr(policy.ID),
-			"weeklyRetention":  llx.StringDataPtr(policy.Properties.WeeklyRetention),
-			"monthlyRetention": llx.StringDataPtr(policy.Properties.MonthlyRetention),
-			"yearlyRetention":  llx.StringDataPtr(policy.Properties.YearlyRetention),
+			"weeklyRetention":  llx.StringDataPtr(weeklyRetention),
+			"monthlyRetention": llx.StringDataPtr(monthlyRetention),
+			"yearlyRetention":  llx.StringDataPtr(yearlyRetention),
 			"weekOfYear":       llx.IntData(weekOfYear),
 		})
 	if err != nil {