OpenAI compatible worker (#19)

Adds initial support for OpenAI compatible inference servers

Available endpoints:

- `/v1/completions`
- `/v1/chat/completions`

workers/openai/test_load.py

@@ -0,0 +1,28 @@
+from lib.test_utils import test_load_cmd, test_args
+from .data_types.server import CompletionsData
+import os
+
+WORKER_ENDPOINT = "/v1/completions"
+
+if __name__ == "__main__":
+    # Check if MODEL_NAME environment variable is set
+    model_name_set = os.environ.get("MODEL_NAME") is not None
+    
+    # Add model argument - required only if MODEL_NAME is not set
+    test_args.add_argument(
+        "--model", 
+        dest="model",
+        required=not model_name_set,
+        help="Model to use for completions request (required if MODEL_NAME env var not set)"
+    )
+    
+    # Parse known args to get model early, before test_load_cmd adds its args
+    known_args, _ = test_args.parse_known_args()
+    
+    # Set environment variable if model was provided
+    if hasattr(known_args, 'model') and known_args.model:
+        os.environ["MODEL_NAME"] = known_args.model
+        print(f"Set MODEL_NAME environment variable to: {known_args.model}")
+    
+    # Now call test_load_cmd normally - it will add its own args and re-parse
+    test_load_cmd(CompletionsData, WORKER_ENDPOINT, arg_parser=test_args)