Rename InsertEndpointAuthProcedure to InsertEndpointAuthCommand

Refactored all usages of InsertEndpointAuthProcedure to InsertEndpointAuthCommand, including method signatures, handler interfaces, and test cases, to better align with CQRS naming conventions for write operations.

tests/ReC.Tests/Application/EndpointAuth/EndpointAuthProcedureTests.cs

@@ -23,7 +23,7 @@ public class EndpointAuthProcedureTests : RecApplicationTestBase
     [Test]
     public async Task InsertEndpointAuthProcedure_runs_via_mediator()
     {
-        var procedure = new InsertEndpointAuthProcedure { Active = true, Description = "auth", TypeId = 1, ApiKey = "key", ApiValue = "value" };
+        var procedure = new InsertEndpointAuthCommand { Active = true, Description = "auth", TypeId = 1, ApiKey = "key", ApiValue = "value" };
 
         var (sender, scope) = CreateScopedSender();
         using var _ = scope;