feat: report cache write tokens from anthropic oai adapter (#8210)

Author: sestinj

packages/openai-adapters/src/apis/Anthropic.ts

@@ -322,7 +322,9 @@ export class AnthropicApi implements BaseLlmApi {
         prompt_tokens: usage?.input_tokens ?? 0,
         prompt_tokens_details: {
           cached_tokens: usage?.cache_read_input_tokens ?? 0,
-        },
+          cache_read_tokens: usage?.cache_read_input_tokens ?? 0,
+          cache_write_tokens: usage?.cache_creation_input_tokens ?? 0,
+        } as any,
       },
       choices: [
         {