fix(shrex): improve resource management

[DeVikingMark]

Prevent resource leaks in shrex recovery middleware:

• Add stream closure in panic recovery handler
• Ensures proper cleanup of network resources in case of panics
• Prevents potential resource leaks in error scenarios

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 44.80%. Comparing base (2469e7a) to head (4a1d93a).
Report is 431 commits behind head on main.

Files with missing lines	Patch %	Lines
share/shwap/p2p/shrex/recovery.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4067      +/-   ##
==========================================
- Coverage   44.83%   44.80%   -0.04%     
==========================================
  Files         265      308      +43     
  Lines       14620    22483    +7863     
==========================================
+ Hits         6555    10073    +3518     
- Misses       7313    11324    +4011     
- Partials      752     1086     +334     

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