Async-graph-data-flow

Added
- Added support for custom edge behaviors, through the new `queue` argument at `add_node`
for a custom queue object. (14)

Deprecated
- Deprecated the `queue_size` argument at `add_node` -- use the new `queue` instead. (14)

Security
- Resolved CVE-2024-56326, CVE-2024-56201, and CVE-2025-27516
by updating jinja2 to v3.1.6 in requirements for Sphinx docs. (14)

Added
- Added static type checking using mypy. (12)

Fixed
- Fixed documentation to actually show example code. (12)

Added
- Python 3.13 is officially supported and tested on CI. (11)

Changed
- Migrated the docs to the Read The Docs site. (11)

Added
- Python 3.12 is officially supported and tested on CI.
- Added a technical notes page to the Sphinx documentation.

Added
- `AsyncGraph.add_node` has the new keyword argument `check_async_gen`
to optionally disable the async generator function check for advanced usage.

Added
- An `AsyncExecutor` instance now has the `start_nodes` property.
It maps start nodes to their arguments passed in at the beginning of graph execution.

Fixed
- Before a graph executes, the `exceptions` property of an `AsyncExecutor` instance
now returns `None`. Previously, accessing this property before graph execute
would raise an exception.