feat(mistral): add async batch job chat completion example

Adds a new example demonstrating how to use Mistral's async batch job API for chat completion. The example creates a batch job with multiple requests, monitors its status, and prints the results once completed. This provides a practical implementation of asynchronous batch processing with Mistral's API.

Author: jean-malo

examples/mistral/jobs/async_batch_job_chat_completion_inline.py

@@ -0,0 +1,40 @@
+from mistralai import Mistral, BatchRequest, UserMessage
+import os
+import asyncio
+
+
+async def main():
+    client = Mistral(api_key=os.environ["MISTRAL_API_KEY"])
+
+    requests = [BatchRequest(
+        custom_id=str(i),
+        body=dict(
+            model="mistral-medium-latest",
+            messages=[UserMessage(
+                content=f"What's i + {i}"
+            )]
+        )
+    ) for i in range(5)
+    ]
+
+    job = await client.batch.jobs.create_async(
+        requests=requests,
+        model="mistral-small-latest",
+        endpoint="/v1/chat/completions",
+        metadata={"job_type": "testing"}
+    )
+
+    print(f"Created job with ID: {job.id}")
+
+    while job.status not in ["SUCCESS", "FAILED"]:
+        await asyncio.sleep(1)
+        job = await client.batch.jobs.get_async(job_id=job.id)
+        print(f"Job status: {job.status}")
+
+    print(f"Job is done, status {job.status}")
+    for res in job.outputs:
+        print(res["response"]["body"])
+
+if __name__ == "__main__":
+    asyncio.run(main())
+