Preserve the native properties on delayed retries (#7900) (#7901)

* Preserve the native properties on delayed retries

* Slightly better assertions hopefully

* Align handler attribute usage with other tests since we forgot to change that

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Co-authored-by: Laila Bougria <laila.bougria@particular.net>
Co-authored-by: Daniel Marbach <danielmarbach@users.noreply.github.com>

Resolve globally registered endpoint-keyed services inside keyed endp…

…oints (#7833) (#7835)

* Cleanup usings

* Add acceptance test to reproduce the most complex scenario

* Properly fallback to global keyed services where necessary and update test cases

* Use "is"

* Refactor service lookup methods to use ConcurrentDictionary for improved performance

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Co-authored-by: Daniel Marbach <daniel.marbach@openplace.net>
Co-authored-by: Daniel Marbach <danielmarbach@users.noreply.github.com>

Support structured logging in downstream providers (#7804) (#7805)

* Pass predictably shaped state objects to underlying logging providers

* Add test to verify structured state preservation in slot scope logging

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Co-authored-by: Adam McCoy <adam@forsedomani.com>
Co-authored-by: Daniel Marbach <danielmarbach@users.noreply.github.com>