Clarify CancellationToken handling in comments

Updated comments to explain the rationale for not directly passing
CancellationToken to methods and instead checking
IsCancellationRequested within locks. This prevents unexpected
OperationCanceledException. Changes made in EverythingAPI.cs
(IsEverythingRunningAsync) and Main.cs (Win32 and UWP program
preparation). No functional changes to the code.

Author: Jack251970

Plugins/Flow.Launcher.Plugin.Explorer/Search/Everything/EverythingAPI.cs

@@ -49,7 +49,7 @@ public static bool IsFastSortOption(EverythingSortOption sortOption)
         public static async ValueTask<bool> IsEverythingRunningAsync(CancellationToken token = default)
         {
             // We do not directly pass token here, but we check IsCancellationRequested inside the lock
-            // So that it will not raise OperationCanceledException, which is not expected by the caller.`
+            // So that it will not raise OperationCanceledException, which is not expected by the caller.
             await _semaphore.WaitAsync();
 
             try

Plugins/Flow.Launcher.Plugin.Program/Main.cs

@@ -85,7 +85,7 @@ public async Task<List<Result>> QueryAsync(Query query, CancellationToken token)
                 var resultList = await Task.Run(async () =>
                 {
                     // We do not directly pass token here, but we check IsCancellationRequested inside the lock
-                    // So that it will not raise OperationCanceledException, which is not expected by the caller.`
+                    // So that it will not raise OperationCanceledException, which is not expected by the caller.
                     Context.API.LogDebug(ClassName, "Preparing win32 programs");
                     List<Win32> win32s;
                     await _win32sLock.WaitAsync();
@@ -100,7 +100,7 @@ public async Task<List<Result>> QueryAsync(Query query, CancellationToken token)
                     }
 
                     // We do not directly pass token here, but we check IsCancellationRequested inside the lock
-                    // So that it will not raise OperationCanceledException, which is not expected by the caller.`
+                    // So that it will not raise OperationCanceledException, which is not expected by the caller.
                     Context.API.LogDebug(ClassName, "Preparing UWP programs");
                     List<UWPApp> uwps;
                     await _uwpsLock.WaitAsync();