Fix: Remove addition slash for check proxy health

[sebastian93921]

Remove the additional slash / at the end of the proxy base URL

Motivation and Context

During an MCP course, I found out that if I type the inspector proxy address base URL as follows, https://s172-29-9-71p6277.lab-aws-production.deeplearning.ai/, it will cause an error

Turns out if the user types a slash / at the end of the address, which will cause a double slash //, it makes the error occur.

How Has This Been Tested?

Add a slash and without a slash

• With a slash / - https://inspector-proxy.ai[/]
  
• Without a slash - https://inspector-proxy.ai
  

Breaking Changes

Will users need to update their code or configurations? No

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

Additional context

[olaservo]

Hi, could you grab the latest from main? We had to push a few bug fixes through including a security update, which looks like it caused some conflicts in your PR. Thanks!

[sebastian93921]

Hi @olaservo
I have moved the regex replaces / logic to the getMCPProxyAddress function, which caters to other API calling functions and solves the merge issue. Thanks!

[sebastian93921]

Hi @olaservo

Finds out there is lint error, I have change var to let in the latest commit. Thanks

[cliffhall]

Tested locally, verified issue and fix.
LGTM! 👍