fix: improve robustness of CI scripts

[MatrixNeoKozak]

1. Added comprehensive error handling to API requests in find-version.mjs. Previously, a failed API request could lead to unhandled promise rejections or subsequent errors when attempting to parse the response as JSON.
2. Implemented explicit error handling for file system operations in generate-html.mjs. This ensures that if critical data files are missing or inaccessible, the script terminates gracefully with an error message rather than crashing with an unhelpful ENOENT stack trace.

Technical Impact: These changes increase the stability of the build pipeline, ensuring that failures in external dependencies or file-system state are diagnosed immediately and clearly, rather than resulting in cryptic runtime errors.

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