#5 Sweetmantech/myc 3550 apiimagegenerate use credits

Summary by CodeRabbit

• New Features

  • Image generation now routes through a paid, authenticated internal endpoint and requires an artist account identifier.
  • Query validation added; responses standardized with explicit error codes.

• Bug Fixes / Reliability

  • Improved error handling, logging, and CORS preflight support; non-OK upstream responses surface standardized error payloads.

• Chores

  • Added payment/wallet integrations and Coinbase client utilities; updated routing mapping.

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