You are working on the blockscout/mcp-server repository. The source code is checked out at /testbed at…

You are working on the blockscout/mcp-server repository. The source code is checked out at /testbed at…: a task in SWE-Lego-RL-2699 (Harbor dataset). Introduce a lightweight, in-process cache for the chains list that encapsulates state and locking. This is separate from the existing per-chain…

The task

Introduce a lightweight, in-process cache for the chains list that encapsulates state and locking. This is separate from the existing per-chain `ChainCache` and does not modify its semantics.

Part of Lego-X/Lego-RL-2699.