Unify error status code as RecStatus.Failed

Renamed RecStatus.QueryFailed to RecStatus.Failed and updated all usages and documentation to reflect its broader purpose as a general failure code for any operation, not just SQL queries. Improved consistency in error handling and status reporting across the codebase.

src/ReC.Application/Common/Behaviors/InvokeAction/PostprocessingBehavior.cs

@@ -36,7 +36,7 @@ public class PostprocessingBehavior(IRecDbContext context, ISender sender) : IPi
 
             await sender.Send(new InsertResultCommand()
             {
-                Status = RecStatus.QueryFailed,
+                Status = RecStatus.Failed,
                 ActionId = request.Action.Id,
                 Error = error,
                 Type = ResultType.Post

src/ReC.Application/Common/Behaviors/InvokeAction/PreprocessingBehavior.cs

@@ -31,7 +31,7 @@ public class PreprocessingBehavior(IRecDbContext context, ISender sender) : IPip
         {
             await sender.Send(new InsertResultCommand()
             {
-                Status = RecStatus.QueryFailed,
+                Status = RecStatus.Failed,
                 ActionId = request.Action.Id,
                 Error = ex.ToString(),
                 Type = ResultType.Pre

src/ReC.Application/RecActions/Commands/InvokeRecActionViewCommand.cs

@@ -157,7 +157,7 @@ public class InvokeRecActionViewCommandHandler(
         {
             await sender.Send(new InsertResultCommand()
             {
-                Status = RecStatus.QueryFailed,
+                Status = RecStatus.Failed,
                 ActionId = action.Id,
                 Error = ex.ToString(),
                 Type = ResultType.Main

src/ReC.Domain/Constants/RecStatus.cs

@@ -6,8 +6,7 @@ namespace ReC.Domain.Constants;
 /// Represents status codes used to indicate the outcome of an operation.
 /// <para>
 /// Includes all standard HTTP status codes as defined in <see cref="System.Net.HttpStatusCode"/>,
-/// as well as custom non-HTTP status codes for SQL query execution results
-/// (e.g., <see cref="RecActionView.PreprocessingQuery"/> and <see cref="RecActionView.PostprocessingQuery"/>).
+/// as well as custom non-HTTP status codes for internal operation results.
 /// </para>
 /// </summary>
 /// <seealso cref="RecStatusExtensions"/>
@@ -21,11 +20,11 @@ public enum RecStatus : short
     QuerySuccess = 0,
 
     /// <summary>
-    /// Indicates that a SQL query execution failed (value 999).
-    /// Used as the result status when <see cref="RecActionView.PreprocessingQuery"/>
-    /// or <see cref="RecActionView.PostprocessingQuery"/> throws an exception.
+    /// Indicates that an operation failed at any stage (value 999).
+    /// This includes SQL query failures during preprocessing/postprocessing,
+    /// HTTP request errors, or any other unhandled exception within the action pipeline.
     /// </summary>
-    QueryFailed = 999,
+    Failed = 999,
 
     //
     // Summary:

src/ReC.Domain/Constants/RecStatusExtensions.cs

@@ -26,7 +26,7 @@ public static class RecStatusExtensions
         => status switch
         {
             RecStatus.QuerySuccess => true,
-            RecStatus.QueryFailed => false,
+            RecStatus.Failed => false,
             _ => status.ToHttpStatusCode() is HttpStatusCode httpStatus && httpStatus.IsSuccess()
         };