Release v0.2.3

v0.2.3

Minor update for handling consistency, small functionality, documentation, and adding integration tests.

• Integration tests take 30+ seconds per test, so they are marked with slow marker, run with pytest -m slow.
• Integration tests get a fixture to run garbage collection manually to cleanup memory between tests.

One main logic update: decode can now fill-in missing punctuation marks, which is helpful for the mnemonics use-case.

Interesting design pattern: manually implemented a new test in f57aea1 as an XFAIL, then (manually) coded the fix in 5b23579 which made the xfail-test pass.

Task File	Contents (truncated)	Accepted SHA	Diffs	Test Diffs	Notes
extra-args-test.md	Add 1-2 tests for llm_extra_args feature. Test that args pass through encode/decode to constructors without real inference. Example usage: llm_extra_args={"n_ctx": 1024}. Mock instantiation/loading.	9abdb61	+0/-0	+29/-0	Simple task, not best execution.
cli-numlogprobs.md	Create optional CLI argument --num-logprobs with default value of 100.	fe8dbf6	+8/-4	+0/-0	Simple.
integration-test.md	Add integration test: msg0 -> encode -> decode -> msg1, assert msg0==msg1. Use pytest marker for slow tests. Mock env variable or config for model_path.	6203b4a	+0/-0	+44/-0	Tricky tests implemented with best practices.
type-main-funcs.md	Add type hints for args and return types to decoder.main_decoder and encoder.main_encode in stego_llm.core. Include expanded docstrings.	b00dd60	+48/-14	+0/-0	Simple but the verbose docstrings are useful to handle with ai.
version-cmd.md	Enable CLI and Python import to display package version from pyproject.toml.	80791f9	+10/-2	+0/-0	Easy, but esoteric.