Fixes prompty pattern matching. Closes #1325 (#1326)

Co-authored-by: Garry Trinder <[email protected]>

Author: waldekmastykarz

DevProxy.Abstractions/LanguageModel/BaseLanguageModelClient.cs

@@ -83,7 +83,7 @@ public async Task<bool> IsEnabledAsync(CancellationToken cancellationToken)
         return _lmAvailable.Value;
     }
 
-    protected abstract IEnumerable<ILanguageModelChatCompletionMessage> ConvertMessages(ChatMessage[] messages);
+    protected abstract IEnumerable<ILanguageModelChatCompletionMessage> ConvertMessages(IEnumerable<ChatMessage> messages);
 
     protected abstract Task<ILanguageModelCompletionResponse?> GenerateChatCompletionCoreAsync(IEnumerable<ILanguageModelChatCompletionMessage> messages, CompletionOptions? options, CancellationToken cancellationToken);
 
@@ -105,8 +105,8 @@ public async Task<bool> IsEnabledAsync(CancellationToken cancellationToken)
         var promptContents = File.ReadAllText(filePath);
 
         var prompty = Prompt.FromMarkdown(promptContents);
-        if (prompty.Prepare(parameters) is not ChatMessage[] promptyMessages ||
-            promptyMessages.Length == 0)
+        if (prompty.Prepare(parameters) is not IEnumerable<ChatMessage> promptyMessages ||
+            !promptyMessages.Any())
         {
             Logger.LogError("No messages found in the prompt file: {FilePath}", filePath);
             return (null, null);

DevProxy.Abstractions/LanguageModel/OllamaLanguageModelClient.cs

@@ -79,7 +79,7 @@ public sealed class OllamaLanguageModelClient(
         }
     }
 
-    protected override IEnumerable<ILanguageModelChatCompletionMessage> ConvertMessages(ChatMessage[] messages)
+    protected override IEnumerable<ILanguageModelChatCompletionMessage> ConvertMessages(IEnumerable<ChatMessage> messages)
     {
         return messages.Select(m => new OllamaLanguageModelChatCompletionMessage
         {

DevProxy.Abstractions/LanguageModel/OpenAILanguageModelClient.cs

@@ -87,7 +87,7 @@ public sealed class OpenAILanguageModelClient(
         }
     }
 
-    protected override IEnumerable<ILanguageModelChatCompletionMessage> ConvertMessages(ChatMessage[] messages)
+    protected override IEnumerable<ILanguageModelChatCompletionMessage> ConvertMessages(IEnumerable<ChatMessage> messages)
     {
         return messages.Select(m => new OpenAIChatCompletionMessage
         {