feat(log_entry): write details unparsed and validate on read

[tvdeyen]

Summary

Recording a payment response creates a Spree::LogEntry, and the log entry serialized the response through YAML.safe_dump. That validated permitted classes at write time and degraded any response it could not serialize, losing the real gateway data. The untrusted boundary is the database read, not the write of our own response, so the log entry now stores the response with a plain YAML.dump and defers the safe_load validation to when parsed_details is read.

The exception behind such a fallback is now reported via Rails.error so it stays visible to developers instead of being silently swallowed.

Checklist

Check out our PR guidelines for more details.

The following are mandatory for all PRs:

• I agree that my PR will be published under the same license as Solidus.
• I have written a thorough PR description.
• I have kept my commits small and atomic.
• I have localized any and all user-facing strings that I added to the source code.
• I have used clear, explanatory commit messages.

The following are not always needed:

• 📖 I have updated the README to account for my changes.
• 📑 I have documented new code with YARD.
• 🛣️ I have opened a PR to update the guides.
• ✅ I have added automated tests to cover my changes.
• 📸 I have attached screenshots to demo visual changes.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.38%. Comparing base (e6705cb) to head (ba412b5).
⚠️ Report is 1403 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6530      +/-   ##
==========================================
+ Coverage   89.66%   92.38%   +2.71%     
==========================================
  Files         990       42     -948     
  Lines       20792      788   -20004     
==========================================
- Hits        18644      728   -17916     
+ Misses       2148       60    -2088     

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.