Description of the PR

fixes https://github.com/guacsec/guac/issues/2124
adds exponential backoff on retry for clearly defined if 429 is encountered
removes confusing log from the certifiers: logger.Info("certifier ended gracefully")
fix deps.dev bug where dependencies were being queried when not needed.

PR Checklist

[x] All commits have a Developer Certificate of Origin (DCO) -- they are generated using -s flag to git commit.
[x] All new changes are covered by tests
[ ] If GraphQL schema is changed, make generate has been run
[ ] If GraphQL schema is changed, GraphQL client updates/additions have been made
[ ] If OpenAPI spec is changed, make generate has been run
[ ] If ent schema is changed, make generate has been run
[ ] If collectsub protobuf has been changed, make proto has been run
[x] All CI checks are passing (tests and formatting)
[x] All dependent PRs have already been merged