feat: align with latest SAQ features and clean up dead code

Author: cofin

litestar_saq/config.py

@@ -227,8 +227,6 @@ class PostgresQueueOptions(TypedDict, total=False):
     min_size: NotRequired[int]
     max_size: NotRequired[int]
     saq_lock_keyspace: NotRequired[int]
-    job_lock_keyspace: NotRequired[int]
-    job_lock_sweep: NotRequired[bool]
     priorities: NotRequired["tuple[int, int]"]
     swept_error_message: NotRequired[str]
     manage_pool_lifecycle: NotRequired[bool]

litestar_saq/exceptions.py

@@ -7,7 +7,3 @@ class ImproperConfigurationError(LitestarSaqError):
 
     This exception is raised only when a module depends on a dependency that has not been installed.
     """
-
-
-class BackgroundTaskError(Exception):
-    """Base class for `Task` related exceptions."""

tests/test_config.py

@@ -50,3 +50,18 @@ def fake_import_module(path: str) -> types.ModuleType:
     config.broker_instance = DummyAsyncRedis()  # type: ignore[assignment]
 
     assert config.broker_type == "redis"
+
+
+def test_postgres_queue_options_does_not_contain_deprecated_options() -> None:
+    """Verify that deprecated postgres lock options are not in PostgresQueueOptions."""
+    from litestar_saq.config import PostgresQueueOptions
+
+    assert "job_lock_keyspace" not in PostgresQueueOptions.__annotations__
+    assert "job_lock_sweep" not in PostgresQueueOptions.__annotations__
+
+
+def test_background_task_error_not_importable() -> None:
+    """Verify that BackgroundTaskError has been removed and cannot be imported."""
+    import litestar_saq.exceptions
+
+    assert not hasattr(litestar_saq.exceptions, "BackgroundTaskError")