Fix TypeError when processing SVG images with undefined edits

[chojs23]

Issue #, if available:

#604

Description of changes:

When processing SVG images where imageRequestInfo.edits is undefined, the code was attempting to access edits.toFormat directly, causing a TypeError that crashed the lambda.

• Fix TypeError when processing SVG images with undefined edits
• Add optional chaining (?.) to safely access edits.toFormat property
• Prevents "Cannot read properties of undefined (reading 'toFormat')" errors

Checklist

• [x] :wave: I have added unit tests for all code changes.
• [x] :wave: I have run the unit tests, and all unit tests have passed.
• [ ] :warning: This pull request might incur a breaking change.

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