metrics: simplify and separate metrics logic from specs#667

Merged

tcoratger merged 9 commits intoleanEthereum:mainfrom

unnawut:metrics-observer

Apr 22, 2026

Commits on Apr 22, 2026

forkchoice: Pattern C — inject ForkChoiceObserver into Store.on_block

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observability: unified SpecObserver, state_transition owns its timing

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observability: hide state-transition stopwatch behind context manager

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observability: hide on_block and on_attestation stopwatches behind context managers

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containers: drop BlockLookup, use plain dict for Store.blocks

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remove extra comments
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observability: rename PrometheusSpecObserver to PrometheusObserver

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fix linting
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containers: reintroduce BlockLookup as a plain type alias

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