fix: resolve HTTP parameter when API uses a server URL with base path

[marle3003]

improve: error message for request body with mismatched content type

[codecov]

Codecov Report

❌ Patch coverage is 68.75000% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 62.47%. Comparing base (78572f9) to head (45812ff).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
providers/openapi/parameter/path.go	54.54%	4 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #658      +/-   ##
==========================================
- Coverage   62.48%   62.47%   -0.02%     
==========================================
  Files         483      483              
  Lines       39424    39435      +11     
==========================================
  Hits        24636    24636              
- Misses      12934    12943       +9     
- Partials     1854     1856       +2     

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