[ISSUE #6513] fix(proxy): enhance ProxyContext

[lyx2000]

fix #6513

Brief changelog

add the relevant client information into the channel attr when client heartbeat to ProxyContext

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[xdkxlk]

LGTM

[drpmma]

LGTM

[zhouxinyu]

Please rebase the develop branch to resolve the CI issue, please refer to #6560 for more details.

[codecov-commenter]

Codecov Report

Merging #6522 (cc30b96) into develop (d9a7315) will increase coverage by 0.01%.
The diff coverage is 52.11%.

❗ Current head cc30b96 differs from pull request most recent head a551ebc. Consider uploading reports for the commit a551ebc to get more accurate results

@@              Coverage Diff              @@
##             develop    #6522      +/-   ##
=============================================
+ Coverage      43.07%   43.09%   +0.01%     
- Complexity      8992     8998       +6     
=============================================
  Files           1107     1107              
  Lines          78260    78295      +35     
  Branches       10201    10202       +1     
=============================================
+ Hits           33713    33743      +30     
- Misses         40318    40329      +11     
+ Partials        4229     4223       -6     

Impacted Files	Coverage Δ
...ker/processor/DefaultPullMessageResultHandler.java	38.46% <0.00%> (ø)
...ocketmq/broker/processor/PeekMessageProcessor.java	3.22% <0.00%> (ø)
...rocketmq/broker/processor/PopMessageProcessor.java	37.61% <0.00%> (ø)
...cketmq/broker/processor/QueryMessageProcessor.java	4.65% <0.00%> (ø)
.../apache/rocketmq/proxy/common/ContextVariable.java	0.00% <ø> (ø)
...xy/grpc/interceptor/AuthenticationInterceptor.java	0.00% <0.00%> (ø)
...proxy/remoting/activity/ClientManagerActivity.java	0.00% <0.00%> (ø)
...etmq/remoting/metrics/RemotingMetricsConstant.java	0.00% <ø> (-70.59%)	⬇️
...ketmq/remoting/metrics/RemotingMetricsManager.java	10.81% <ø> (-4.58%)	⬇️
...apache/rocketmq/remoting/protocol/RequestCode.java	0.00% <ø> (ø)
... and 7 more

... and 25 files with indirect coverage changes

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