Tech task: Convert session strategy to symbol before using in route helper (#2779)
Tech task: Convert session strategy to symbol before using in route helper (#2779)

See: #2771
New sessions will get a symbol stored in session rather than a string, but existing sessions will still have the string stored.

I found this after releasing to UMass prod. This change is in place on production now.
I've tested on stage to confirm this resolves the issue.
tablexi/nucore-open,tablexi/nucore-open,tablexi/nucore-open,tablexi/nucore-open