fix: change top_p from 0 to 0.1 for DeepSeek API compatibility

DeepSeek's OpenAI-compatible API rejects top_p=0 with:
  'Invalid top_p value, the valid range of top_p is (0, 1.0]'

top_p=0.1 is the closest valid value that preserves near-deterministic
behavior while satisfying the API constraint.

Author: Travelguest

src/community/openai/model-provider.ts

@@ -93,7 +93,7 @@ export class OpenAIModelProvider implements ModelProvider {
       messages: convertToOpenAIMessages(messages),
       tools: tools ? convertToOpenAITools(tools) : undefined,
       temperature: 0,
-      top_p: 0,
+      top_p: 0.1,
       ...options,
     };
   }