[issue_tracker] Fix broken PSCID & Visit links

[victori444]

Brief summary of changes

This resolves the issue of PSCID and Visit Label links that would previously lead to 500/404 errors because the values for dccid and sessionID were null/undefined.

Testing instructions (if applicable)

1. In the issue tracker, click on the PSCID and Visit Label links in the table and verify they both lead to the appropriate pages / verify that the links contain the right candIDs and sessionIDs (i.e. these values are not null/undefined)

Link(s) to related issue(s)

• Resolves [issue_tracker] PSCID and Visit Label links break on the issue tracker page #10603