feat: disable DebugProbe UI in production by default

[georgidhristov]

Closes #97

Summary

Disable DebugProbe UI endpoints in Production by default and require explicit opt-in when UI access is needed.

Changes

• Added AllowUiInProduction option
• Default value is false
• Prevented DebugProbe UI endpoints from being registered in Production when not explicitly enabled
• UI protection applies to:
  • Dashboard
  • Trace Viewer
  • Compare UI
  • Future UI pages
• Request capture, response capture, and trace storage remain unaffected

Example

builder.Services.AddDebugProbe(options =>
{
    options.AllowUiInProduction = true;
});