feat(inference): scaffold inference.py with OpenAI client config and env vars

inference.py

@@ -0,0 +1,16 @@
+import os
+import asyncio
+import logging
+from openai import OpenAI
+
+logging.basicConfig(level=logging.INFO)
+logger = logging.getLogger(__name__)
+
+API_BASE_URL = os.environ.get("API_BASE_URL", "http://localhost:7860")
+MODEL_NAME   = os.environ.get("MODEL_NAME",   "mistralai/Mistral-7B-Instruct-v0.3")
+HF_TOKEN     = os.environ.get("HF_TOKEN",     "")
+
+client = OpenAI(
+    base_url = f"https://api-inference.huggingface.co/models/{MODEL_NAME}/v1",
+    api_key  = HF_TOKEN,
+)