fix&docs&test: 修复pprof显示和taskgroup重试任务从队列取出运行，新增文档说明如何使用监控端口

[Breeze0806]

No description provided.

[codecov-commenter]

Codecov Report

Patch coverage: 85.18% and project coverage change: +0.17 🎉

Comparison is base (df2bda9) 92.31% compared to head (d9bdd5b) 92.48%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #16      +/-   ##
==========================================
+ Coverage   92.31%   92.48%   +0.17%     
==========================================
  Files         121      121              
  Lines        6541     6545       +4     
==========================================
+ Hits         6038     6053      +15     
+ Misses        400      393       -7     
+ Partials      103       99       -4     

Impacted Files	Coverage Δ
datax/core/taskgroup/container.go	86.62% <81.81%> (-0.71%)	⬇️
datax/core/taskgroup/task_execer.go	97.51% <100.00%> (+8.96%)	⬆️
datax/core/taskgroup/task_manager.go	100.00% <100.00%> (ø)
datax/core/transport/channel/channel.go	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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