fix: import toChatMessage from correct module in e2e tests

The toChatMessage function is exported from chat-compat.js, not sdk.js.

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Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: mattapperson

tests/e2e/call-model.test.ts

@@ -5,7 +5,8 @@ import type { OpenResponsesFunctionCallOutput } from '../../src/models/openrespo
 
 import { beforeAll, describe, expect, it } from 'vitest';
 import { z } from 'zod/v4';
-import { OpenRouter, ToolType, toChatMessage } from '../../src/sdk/sdk.js';
+import { OpenRouter, ToolType } from '../../src/sdk/sdk.js';
+import { toChatMessage } from '../../src/lib/chat-compat.js';
 import { OpenResponsesNonStreamingResponse } from '../../src/models/openresponsesnonstreamingresponse.js';
 import { OpenResponsesStreamEvent } from '../../src/models/openresponsesstreamevent.js';