Create openai_client.py

app/openai_client.py

@@ -0,0 +1,9 @@
+from __future__ import annotations
+import os, json
+import httpx
+
+OPENAI_BASE = os.environ.get("OPENAI_BASE", "https://api.openai.com/v1")
+OPENAI_MODEL = os.environ.get("OPENAI_MODEL", "gpt-4o-mini")
+OPENAI_API_KEY = os.environ.get("OPENAI_API_KEY")
+
+_headers =