[do not merge][SB/CB] Final FMS API supporting paged and non-paged attention

[yannicks1]

Final FMS API supporting paged and non-paged attention

This final Fms API will support both the static and continuous batching APIs. Currently consuming this fms branch. Only minimal changes required on vLLM Spyre side.

Note: Do not merge until in fms main.

[github-actions]

👋 Hi! Thank you for contributing to vLLM support on Spyre.
Just a reminder: Make sure that your code passes all the linting checks, otherwise your PR won't be able to be merged. To do so, first install the linting requirements, then run format.sh and commit the changes. This can be done with uv directly:

uv sync --frozen --group lint

Or this can be done with pip:

uv pip compile --group lint > requirements-lint.txt
pip install -r requirements-lint.txt
bash format.sh

Now you are good to go 🚀