fix: ensure alb response header values are strings #699
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There are two open issues surrounding issues with ALB when response header values such as 'content-length' are not strings. This results in a 502 response from ALB. We have also encountered this problem and can confirm this change fixes this issue.
#563
#688
Description of changes:
This change converts all response header values to strings. A change was already made in this PR to convert all multipart headers to strings but the normal headers property was missed.
Checklist
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