feat(sse): add middleware to prevent proxy buffering of SSE connections

[DivyMohan14]

No description provided.

[johnstcn]

This works, but it might be better to conditionally set the header on the specific routes.

[DivyMohan14]

This works, but it might be better to conditionally set the header on the specific routes.

Makes sense went through Huma docs, saw that this might be the best pattern according to the docs, lemme know if there is any better approach to this

created a central middleware, pluged into the sse routes

[johnstcn]

Thanks! I added some unit tests on top of your branch in c47bb10 -- would you mind cherry-picking that in or adapting those into your branch? Chef's choice.

[DivyMohan14]

Thanks for adding the unit tests :)
cherry picked them into the branch