I’m of the mind that this whole thing will revolve around Kostorg. Most of the message is pretty clear- the Triglavians are rather disconcerted to find that the Second Empire is completely gone, since they last checked in on it at the “126.96.36.199” stage, presumably before its collapse really took hold.
It’s that final sentence that’s stumbling us, because Noema can be so situational, thus we need context to get a proper sense of what it means here. Kostorg is a capitalized noun- it’s a term of importance, and the subject of the sentence. If we figure out what Kostorg means, the rest should fall into place.
Approaching it from the other end, though, we can summarize the rest of the sentence: Noemata can translate as “thoughts”, “beliefs”, “judgements”, just about anything of the sort, even “policies”. So, we have Noemata from the distant past being evoked in the present, and disregarding whatever a “Kostorg conduit” is, we knows it’s something that flows, and “confluence” is the act of streams or flows converging. Our Noemata has something to do with the converging flow of “Kostorg conduits”… but that brings us right back to square one, the subject of our missing context: What even is a Kostorg?