includes a character created for the Starfleet Academy
comic, but I don't think that necessarily means the actual stories of that comic are part of the same continuity. It could just be a case of one version of the continuity adopting a character from a different version, like the way Batman comics adopted Harley Quinn and Renee Montoya from the animated series.
As for the Assignment: Earth
comic, it contradicts the Eugenics Wars
novels in several respects, so the whole thing can't fit into the Lit-verse unless you treat it as an alternate timeline.
Ultimately, it's up to the individual reader to decide which works fit together and which don't. Some readers are willing to gloss over inconsistencies that others aren't.