refactor: restrict model checks to gpt-* for OpenAI/Codex models

- Updated model resolution logic to only check for gpt-* models, removing references to unsupported o1/o3 models in both model-resolver and provider-factory files.
- Enhanced comments for clarity regarding model support in Codex CLI.

apps/server/src/providers/provider-factory.ts

@@ -21,8 +21,9 @@ export class ProviderFactory {
   static getProviderForModel(modelId: string): BaseProvider {
     const lowerModel = modelId.toLowerCase();
 
-    // OpenAI/Codex models (gpt-*, o1, o3, etc.)
-    if (lowerModel.startsWith("gpt-") || lowerModel.startsWith("o")) {
+    // OpenAI/Codex models (gpt-*)
+    // Note: o1/o3 models are not supported by Codex CLI
+    if (lowerModel.startsWith("gpt-")) {
       return new CodexProvider();
     }