fix(server.proxy): [nan-1049] if the response not chunked manually piece the response together

[khaliqgant]

Describe your changes

Issue reported in the community. The proxy assumed that providers send back the data chunked but that is not the case. When it is not chunked we need to manually piece together the chunks and parse the string data.

Issue ticket number and link

NAN-1049

Checklist before requesting a review (skip if just adding/editing APIs & templates)

• I added tests, otherwise the reason is:
• I added observability, otherwise the reason is:
• I added analytics, otherwise the reason is:

[linear]

NAN-1049 When the proxy receives a string as a response it isn't handled properly

[TBonnin]

a bit annoying that we have to deal with provider malfunctioning APIs, sending back chunked response without setting the transfer-encoding: chunked header

[khaliqgant]

a bit annoying that we have to deal with provider malfunctioning APIs, sending back chunked response without setting the transfer-encoding: chunked header

Yeah and it is only for certain api endpoints as well 😩

[AnandChowdhary]

Sorry you had to deal with this weird inconsistency and thank you so much for your hard work, much appreciated!