fix: use public stage endpoints

[moritzraho]

Description

Fix support for Adobe State stage from Runtime prod by accessing public stage endpoint

additional chore:

• also default to development-* namespace for non-prod mock sample environment

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

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)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (9582f46) to head (05eac29).

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #152   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            6         6           
  Lines          227       227           
  Branches        47        47           
=========================================
  Hits           227       227           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.