fix(cli): recover unescaped quotes in JSON repair step

[maxprilutskiy]

Summary

Recover from unescaped double quotes in model translation responses so they no longer trigger a costly fallback retranslation.

Changes

• Added an escapeUnescapedQuotes pass in model-response.ts that runs only when JSON.parse and jsonrepair both fail. It scans the string, treating a " as a real terminator only when followed by a structural delimiter (:, ,, }, ]) or end-of-input, and escaping any other in-string quote before retrying jsonrepair. Claude Sonnet occasionally emits values like "She said "hi" and "bye"" that plain jsonrepair can't recover.

Testing

Business logic tests added:

• parseModelResponse recovers a value with multiple unescaped quotes
• parseModelResponse recovers a trailing unescaped quote at the end of a value
• escapeUnescapedQuotes leaves already-escaped quotes and valid JSON untouched
• All tests pass locally (17 passing)

Checklist

• Changeset added
• Tests cover business logic (not just happy path)
• No breaking changes

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch eng-609-processlocalize-fix-unescaped-quotes-in-the-json-repair-378e

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