Candidate profile page: 404 when navigating directly to 2-year transaction period if fec_cycles_in_election null

[patphongs]

Summary

Navigating to the 2-year transaction period directly on a candidate profile page without fec_cycles_in_election will result in a 404.

How to Reproduce

1. Go to this URL and it will 404: https://www.fec.gov/data/candidate/S6FL00335/?cycle=2014&election_full=false

What should have happened?

The user should not get a 404 when doing this. Consider a redirect to the main All years slice when this happens. Example https://www.fec.gov/data/candidate/S6FL00335/?cycle=2014&election_full=false redirects to https://www.fec.gov/data/candidate/S6FL00335/. By default, the main candidate URL without query params is election_full=true and cycle=[max_cycle]

Screenshots

Related PR

#4034

[JonellaCulmer]

De-prioritizing this issue for now. Not easy to get to that broken page. Navigating through normal methods throughout the site gets the user to the right place.