fix(adminPanel): Fix max length of link header allowed

[alexd-bes]

No issue: Fix max length of link header allowed

Changes:

• There is a default max length allowed for a link header to be parsed using parse-link-header of 2000 characters. Occasionally this is exceeded, which results in an error. This change is to allow us to set our own limit in the env variables, and to get vite to carry this var through

[jaskfla]

Nice find (and wild that we have links that long??)

Left a tiny suggestion, but not sure if we like/want the explicitness of the current implementation so pre-approving. Thanks for this fix!