Replace fixed wait in get_query_results() with polling loop

Remove the hard 45s sleep and replace with a polling loop (12 attempts
x 15s = 180s max). The test now succeeds even when the Celery worker is
slow to process the query during cold starts or memory pressure.

Closes #58

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: szachovy

CHANGELOG.md

@@ -16,6 +16,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * CI workflow to build and push service images to GitHub Container Registry on master merge. (#97)
 * Pull-first with local build fallback for container images during deployment. (#97)
 
+### Fixed
+
+* Replace fixed 45s wait in get_query_results() with polling loop (12×15s). (#58)
+
 ### Changed
 
 * Completed [ARCHITECTURE.md](./docs/ARCHITECTURE.md) (#93)

tests/testsuite/roles/testing/files/functional_superset.py

@@ -325,7 +325,6 @@ def run_query(self) -> float:
         raise ValueError(f"Could not find query details in {sqllab_run_query!r}")
 
     def get_query_results(self, dttm_time_query_identifier: float) -> None:
-        time.sleep(45)  # state refreshing
         ts = int(dttm_time_query_identifier) - 5000
         command = f"""
             curl \
@@ -339,14 +338,14 @@ def get_query_results(self, dttm_time_query_identifier: float) -> None:
                 --header 'Referer: https://{self.virtual_ip_address}' \
                 --header '{self.api_csrf_header}'
         """
-        for _ in range(10):
+        for _ in range(12):
+            time.sleep(15)
             query_result = self.decode_command_output(
                 self.run_command_on_the_container(command)
             )
             list_of_results = query_result.get("result")
             if isinstance(list_of_results, list) and len(list_of_results) > 0:
                 break
-            time.sleep(30)
         else:
             raise ValueError(f"Could not get non-empty results after retries from {query_result}")
         first_result = list_of_results[0]