Dmytro Haidashenko

Hotfix for v2.14: BCI-4095 rpc deadlock

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Cherry-pick from [14236](https://github.com/smartcontractkit/chainlink/pull/14236)

BCI-3668 Optimise HeadTracker's memory usage

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[Ticket.](https://smartcontract-it.atlassian.net/browse/BCI-3668) Previously HeadTracker performed deep copy of the canonical chain every time new block was added to avoid race condition on .Parent field, when old blocks were removed. This causes...

## Motivation ## Solution

Feature/bci 3668 optimise ht memory v2

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## Motivation ## Solution

NONEVM-1325 fix lp memory

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https://smartcontract-it.atlassian.net/browse/NONEVM-1325

DO NOT MERGE NONEVM-748 logpoller perf testing 3

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core ref: 670d5c27513d9c4a1b42277177fb28e9af46d852

Mock cabability test v2 dh

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### Requires ### Supports