bsdd: fix CI test failure by spacing API calls 3s apart

The retry logic alone is not sufficient: back-to-back calls can exhaust
the retry budget before the rate limit window resets. Sleep 3s between
each module-level prefetch call (the API limit is ~1 req/2s).

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src/bsdd/tests/test_bsdd.py

@@ -1,19 +1,27 @@
+import time
+
 from bsdd import Client
 
 client = Client()
 
 # Fetch shared data at module level to avoid repeated API calls during tests.
-# The Client.get() method handles 429 rate-limit responses with automatic retry.
+# Sleep 3s between calls: the bSDD API rate-limits to ~1 req/2s, and Client.get()
+# retries on 429, but back-to-back calls without spacing still exhaust the retry budget.
 _dictionaries = client.get_dictionary()["dictionaries"]
 ifc4x3_uri = next(l["uri"] for l in _dictionaries if "4.3" in l["uri"])
 nbs_uri = next(l["uri"] for l in _dictionaries if "Uniclass 2015" == l["name"])
 
+time.sleep(3)
 _ifc4x3_classes = client.get_classes(ifc4x3_uri, use_nested_classes=False, class_type="Class")
+time.sleep(3)
 _nbs_classes = client.get_classes(nbs_uri, use_nested_classes=False, class_type="Class", offset=0, limit=5)
 _uri_light_fixture = next(l for l in _ifc4x3_classes["classes"] if "IfcLightFixture" == l["code"])["uri"]
 
+time.sleep(3)
 _light_fixture = client.get_class(_uri_light_fixture)
+time.sleep(3)
 _light_fixture_relations = client.get_class_relations(_uri_light_fixture)
+time.sleep(3)
 _light_fixture_properties = client.get_class_properties(_uri_light_fixture)