chore(llmobs): add experiment url (#14134)

Add a url property so users can easily hop into the product after an
experiment is run.

Author: Kyle-Verhoog

ddtrace/llmobs/_experiment.py

@@ -297,6 +297,12 @@ def run(
         )
         return experiment_results
 
+    @property
+    def url(self) -> str:
+        # FIXME: need to use the user's site
+        # also will not work for subdomain orgs
+        return f"https://app.datadoghq.com/llm/experiments/{self._id}"
+
     def _process_record(self, idx_record: Tuple[int, DatasetRecord]) -> Optional[TaskResult]:
         if not self._llmobs_instance or not self._llmobs_instance.enabled:
             return None

tests/llmobs/test_experiments.py

@@ -82,6 +82,7 @@ def test_dataset_one_record(llmobs):
 def test_dataset_create_delete(llmobs):
     dataset = llmobs.create_dataset(name="test-dataset-2", description="A second test dataset")
     assert dataset._id is not None
+    assert dataset.url == f"https://app.datadoghq.com/llm/datasets/{dataset._id}"
 
     llmobs._delete_dataset(dataset_id=dataset._id)
 
@@ -723,6 +724,7 @@ def test_experiment_run(llmobs, test_dataset_one_record):
     assert exp_result["input"] == {"prompt": "What is the capital of France?"}
     assert exp_result["output"] == {"prompt": "What is the capital of France?"}
     assert exp_result["expected_output"] == {"answer": "Paris"}
+    assert exp.url == f"https://app.datadoghq.com/llm/experiments/{exp._id}"
 
 
 def test_experiment_span_written_to_experiment_scope(llmobs, llmobs_events, test_dataset_one_record):