Add QueueRepositoryInterface with memory and file-backed adapters.

Provide a generic disk-backed FIFO queue with configurable path, retention, and dedup keys so consumers can buffer items across restarts without optional extras.

Co-authored-by: Cursor <cursoragent@cursor.com>

python_repositories/interfaces/__init__.py

@@ -8,6 +8,9 @@ from .json_repository_interface import (
 from .object_repository_interface import (
     ObjectRepositoryInterface as ObjectRepositoryInterface,
 )
+from .queue_repository_interface import (
+    QueueRepositoryInterface as QueueRepositoryInterface,
+)
 from .table_repository_interface import (
     TableRepositoryInterface as TableRepositoryInterface,
 )
@@ -17,5 +20,6 @@ __all__ = [
     "ContextAwareInterface",
     "JsonRepositoryInterface",
     "ObjectRepositoryInterface",
+    "QueueRepositoryInterface",
     "TableRepositoryInterface",
 ]