feat: add hash code to request query parameter

[zhu-xiaowei]

Description

1. remove hash code in event attribute
2. add hash code in request query parameter

General Checklist

• Added new tests to cover change, if needed
• Build succeeds using Swift Package Manager
• All unit tests pass
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• Documentation update for the change if required
• PR title conforms to conventional commit style
• If breaking change, documentation/changelog update with migration instructions

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.07% ⚠️

Comparison is base (b20086b) 95.23% compared to head (d343ee0) 95.17%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #35      +/-   ##
==========================================
- Coverage   95.23%   95.17%   -0.07%     
==========================================
  Files          34       34              
  Lines        1763     1761       -2     
==========================================
- Hits         1679     1676       -3     
- Misses         84       85       +1     

Files Changed	Coverage Δ
...ependency/Clickstream/Event/ClickstreamEvent.swift	97.84% <ø> (-0.07%)	⬇️
Sources/Clickstream/Network/NetRequest.swift	78.00% <100.00%> (-1.60%)	⬇️

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