solve embedding service json response issue

[HalemoGPA]

Description

Type of change

• 🚨 Breaking change - causes existing functionality to break (triggers MAJOR version bump)
• ✨ New feature - adds functionality in a non-breaking way (triggers MINOR version bump)
• 🐛 Bug fix - fixes an issue without changing functionality (triggers PATCH version bump)
• 🏠 Internal - changes that don't affect external functionality (no version bump)
  (e.g., refactoring, docs, tests, admin site changes)

Release Impact

• Current version:
• Next version will be:

Checklist

• My code follows the style guidelines
• My code is tested with 99%+ coverage
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have updated the documentation to reflect my changes
• I have added/updated tests to cover my changes

Breaking Changes

Migration Guide

Additional Notes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
web/api/models.py	100.00% <100.00%> (ø)