Add additional validation to otel endpoint

[javorszky]

Proposed changes

• Add additional validation to otel endpoint to make sure URI is valid

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

failing Unit test

[codecov]

Codecov Report

Attention: Patch coverage is 91.89189% with 6 lines in your changes missing coverage. Please review.

Project coverage is 52.82%. Comparing base (71639ef) to head (e5afbc9).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/validation/validation.go	91.30%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7909      +/-   ##
==========================================
+ Coverage   52.67%   52.82%   +0.15%     
==========================================
  Files          90       90              
  Lines       21598    21671      +73     
==========================================
+ Hits        11376    11447      +71     
- Misses       9745     9747       +2     
  Partials      477      477              

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