Replace the {Account, Storage, Code} time.Duration scalars threaded through
ProcessResultWithMetrics, txExecResult, processBlockPreTx and resultHandler
with a single ReadDurations struct + Add merge primitive. Same shape as
StateCounts. Adds (*StateDB).SnapshotReads() helper at the boundary.
The struct is 80 bytes (10 ints) — value semantics matches the type's
"snapshot, safe to pass by value" thesis stated in its doc comment, and
removes three unnecessary &-takings at call sites. No behavior change.
To check whether a transaction can be applied, we validate that
`blockGasLimit > txGasLimit + (cumulativeRegularGasUsed +
cumulativeStateGasUsed)`. However, the check should only be applied to
the bottleneck resource, i.e. `blockGasLimit >
max(txRegularGasUsed+cumulativeRegularGasUsed, txStateGasUsed+
cumulativeStateGasUsed)`.
The changes here break multiple tests. I am trying to determine why.
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Co-authored-by: qu0b <stefan@starflinger.eu>
