Ensure diagnostic logger verbosity Fixes #7780 (#7897)

Author: Forgind

Diff for: src/Build/BackEnd/BuildManager/BuildManager.cs

@@ -466,6 +466,12 @@ public void BeginBuild(BuildParameters parameters)
 
             _previousLowPriority = parameters.LowPriority;
 
+            if (Traits.Instance.DebugEngine)
+            {
+                parameters.DetailedSummary = true;
+                parameters.LogTaskInputs = true;
+            }
+
             lock (_syncLock)
             {
                 AttachDebugger();

Diff for: src/MSBuild/XMake.cs

@@ -2366,6 +2366,12 @@ string commandLine
                         out enableProfiler
                         );
 
+                    // We're finished with defining individual loggers' verbosity at this point, so we don't need to worry about messing them up.
+                    if (Traits.Instance.DebugEngine)
+                    {
+                        verbosity = LoggerVerbosity.Diagnostic;
+                    }
+
                     if (commandLineSwitches.IsParameterizedSwitchSet(CommandLineSwitches.ParameterizedSwitch.DetailedSummary))
                     {
                         detailedSummary = ProcessBooleanSwitch(commandLineSwitches[CommandLineSwitches.ParameterizedSwitch.DetailedSummary], defaultValue: true, resourceName: "InvalidDetailedSummaryValue");