Validate tlog entry when verifying signature via public key. #1833
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Summary
Previously, when signatures were validated via public key, we only
checked for the existence of the tlog, but didn't actually validate the
entry. This refactors the code to ensure both cert + public paths go
through the same tlog entry validation.
Signed-off-by: Billy Lynch billy@chainguard.dev
Ticket Link
Fixes #1816
Release Note