Why don't allow updates to statically configured clusters via `addOrUpdateCluster` function?

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Description

Contributor guide

Research direction

Examine the `addOrUpdateCluster` implementation in `source/server/cluster manager impl.cc` and understand the reasons for not allowing updates to statically configured clusters. Look at how static clusters are stored and compared during updates. Check related tests and documentation.

Tech stack

cpp

Domain

backendinfrastructure

Issue type

Research

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

Half day

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

Active

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

Clear

Prerequisites

C++

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

30