Fix blocking Windows metric binding during startup

[HTHou]

Summary

• bind Windows disk and net metric registration on background daemon threads instead of blocking bindTo
• remove eager Windows metric collection during manager construction so startup does not trigger synchronous metric fetches
• drop fixed 5-second waits from session integration tests that are no longer needed after metric binding becomes asynchronous

Testing

• Not run (not requested)

[sonarqubecloud]

Quality Gate failed

Failed conditions
95.7% Duplication on New Code (required ≤ 5%)

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 0% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 39.75%. Comparing base (75bfa23) to head (fedff2b).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...che/iotdb/metrics/metricsets/disk/DiskMetrics.java	0.00%	8 Missing ⚠️
...pache/iotdb/metrics/metricsets/net/NetMetrics.java	0.00%	8 Missing ⚠️
...etrics/metricsets/net/WindowsNetMetricManager.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master   #17423   +/-   ##
=========================================
  Coverage     39.75%   39.75%           
  Complexity      312      312           
=========================================
  Files          5134     5134           
  Lines        346900   346907    +7     
  Branches      44193    44194    +1     
=========================================
+ Hits         137899   137905    +6     
- Misses       209001   209002    +1     

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