fix: 为解码 JSON 相关代码增加错误捕获

[BigOrangeQWQ]

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[codecov]

Codecov Report

❌ Patch coverage is 45.45455% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.02%. Comparing base (3d132c9) to head (783a576).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/providers/docker_test/plugin_test.py	42.85%	4 Missing ⚠️
src/providers/docker_test/__init__.py	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #444      +/-   ##
==========================================
- Coverage   94.25%   94.02%   -0.24%     
==========================================
  Files          40       40              
  Lines        2402     2409       +7     
==========================================
+ Hits         2264     2265       +1     
- Misses        138      144       +6     

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[Copilot]

Pull request overview

This PR adds comprehensive error handling for JSON decoding operations across the Docker testing infrastructure, preventing crashes when encountering malformed JSON data.

Key changes:

• Added try-except blocks for JSON parsing operations with specific JSONDecodeError handling
• Implemented fallback error messages and data structures when JSON parsing fails
• Improved file reading approach using read_text() method with explicit encoding

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/providers/docker_test/plugin_test.py	Added error handling when reading and parsing plugin metadata.json file, with informative error logging
src/providers/docker_test/__init__.py	Added error handling for Docker container output JSON parsing with fallback data structure

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