[PM-23580] Security Task Metrics (#6164)

* add metrics endpoint for an organization to return completed and total security tasks

* refactor metrics fetch to use sql sproc for efficiency rather than having to pull all security task data

* add separate response model for security task metrics endpoint

* Pascal Case to match existing implementations

* refactor org to organization for consistency with other methods

* alter security task endpoint:
- remove "count" from variable naming
- update sproc naming

* remove enablement check

* replace orgId with organizationId

src/Api/Vault/Models/Response/SecurityTaskMetricsResponseModel.cs

@@ -0,0 +1,21 @@
+namespace Bit.Api.Vault.Models.Response;
+
+public class SecurityTaskMetricsResponseModel
+{
+
+    public SecurityTaskMetricsResponseModel(int completedTasks, int totalTasks)
+    {
+        CompletedTasks = completedTasks;
+        TotalTasks = totalTasks;
+    }
+
+    /// <summary>
+    /// Number of tasks that have been completed in the organization.
+    /// </summary>
+    public int CompletedTasks { get; set; }
+
+    /// <summary>
+    /// Total number of tasks in the organization, regardless of their status.
+    /// </summary>
+    public int TotalTasks { get; set; }
+}