Initial Service Manager v4 Support

[gsteel]

Provides initial support for SMv4

There is still a fair bit of work to do where the FilterPluginManager is consumed by FilterChain + other filters. These will need to be refactored with the FilterPluginManager as a hard-dependency in the constructor, otherwise none of the aliases will work now they have been extracted to the config provider.

Closes #125

[boesing]

I wonder if we should provide a CallableFilter with v4 so that we do not have this mixed stuff laying around. Just not 100% sure where and how to map callables to the CallableFilter but that would at least reduce complexity a little bit. Just some thought which came to my mind, nothing we have to do - just wanted to drop that here.

[gsteel]

I wonder if we should provide a CallableFilter with v4 so that we do not have this mixed stuff laying around. Just not 100% sure where and how to map callables to the CallableFilter but that would at least reduce complexity a little bit. Just some thought which came to my mind, nothing we have to do - just wanted to drop that here.

I was thinking the same thing. Probably worth exploring in a separate patch

[gsteel]

@boesing - I'd appreciate another review when you get a chance! Cheers.

[boesing]

will do later, have to take a 4h train and thus need some stuff to do 😁

[gsteel]

TYVM @boesing 🙏