Clarify error message on indexer request error

Resolved conflict in TitleLookupController.cs by keeping the master version with colon handling fix.
This brings develop up to date with master (v0.7.4), including the November bug fixes.

UmlautAdaptarr/Services/ProxyRequestService.cs

@@ -54,6 +54,7 @@ namespace UmlautAdaptarr.Services
             }
 
             await EnsureMinimumDelayAsync(targetUri);
+            var targetHost = new Uri(targetUri).Host;
 
             var requestMessage = new HttpRequestMessage
             {
@@ -88,7 +89,14 @@ namespace UmlautAdaptarr.Services
             }
             catch (Exception ex)
             {
-                _logger.LogError(ex, $"Error proxying request: {UrlUtilities.RedactApiKey(targetUri)}. Error: {ex.Message}");
+                var upstreamMessage = IsTimeoutOrReset(ex)
+                    ? $"{targetHost} timed out or reset the connection. This is an error with your indexer or network, not with UmlautAdaptarr."
+                    : $"{targetHost} request failed. This is an error with your indexer or network, not with UmlautAdaptarr.";
+
+                _logger.LogError(ex, "{UpstreamMessage} Target: {TargetUri} Error: {ErrorMessage}",
+                    upstreamMessage,
+                    UrlUtilities.RedactApiKey(targetUri),
+                    ex.Message);
 
                 var errorResponse = new HttpResponseMessage(System.Net.HttpStatusCode.InternalServerError)
                 {
@@ -97,5 +105,26 @@ namespace UmlautAdaptarr.Services
                 return errorResponse;
             }
         }
+
+        private static bool IsTimeoutOrReset(Exception ex)
+        {
+            if (ex is TaskCanceledException)
+            {
+                return true;
+            }
+
+            var current = ex;
+            while (current != null)
+            {
+                if (current is System.Net.Sockets.SocketException socketEx)
+                {
+                    return socketEx.SocketErrorCode == System.Net.Sockets.SocketError.TimedOut
+                        || socketEx.SocketErrorCode == System.Net.Sockets.SocketError.ConnectionReset;
+                }
+                current = current.InnerException;
+            }
+
+            return false;
+        }
     }
 }