cluster模块faq建设

[asa3311]

cluster faq建设
调整MergerFactory日志warn详细输出。

What is the purpose of the change

Brief changelog

Verifying this change

Checklist

• Make sure there is a GitHub_issue field for the change (usually before you start working on it). Trivial changes like typos do not require a GitHub issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
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[codecov-commenter]

Codecov Report

Merging #10519 (40ad341) into 3.1 (f752ecf) will decrease coverage by 0.22%.
The diff coverage is 50.00%.

@@             Coverage Diff              @@
##                3.1   #10519      +/-   ##
============================================
- Coverage     65.65%   65.43%   -0.23%     
+ Complexity      319      293      -26     
============================================
  Files          1286     1286              
  Lines         55222    55222              
  Branches       8269     8268       -1     
============================================
- Hits          36257    36134     -123     
- Misses        15042    15156     +114     
- Partials       3923     3932       +9     

Impacted Files	Coverage Δ
...apache/dubbo/rpc/cluster/merger/MergerFactory.java	71.42% <50.00%> (ø)
...mmon/serialize/fastjson2/FastJson2ObjectInput.java	0.00% <0.00%> (-62.50%)	⬇️
...mon/serialize/fastjson2/FastJson2ObjectOutput.java	0.00% <0.00%> (-56.25%)	⬇️
...on/serialize/fastjson2/FastJson2Serialization.java	57.14% <0.00%> (-28.58%)	⬇️
...n/serialize/fastjson2/Fastjson2CreatorManager.java	46.66% <0.00%> (-20.00%)	⬇️
...dubbo/common/status/support/LoadStatusChecker.java	50.00% <0.00%> (-16.67%)	⬇️
...erialize/support/DefaultSerializationSelector.java	50.00% <0.00%> (-10.00%)	⬇️
...e/dubbo/remoting/transport/netty/NettyChannel.java	52.27% <0.00%> (-7.96%)	⬇️
...bo/rpc/protocol/dubbo/DecodeableRpcInvocation.java	70.19% <0.00%> (-6.74%)	⬇️
...e/dubbo/rpc/protocol/tri/transport/WriteQueue.java	73.80% <0.00%> (-4.77%)	⬇️
... and 21 more

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