Changes touching this path

• the forge keeps the attestations a push carries and serves them back with their change, where until now it kept none: ingest never read the bundle attestation lane and every bundle serve built carried an empty one, so a tag, a note or a sign-off pushed to a forge was gone and the push said nothing, while a relay was never affected because its store is a DagRepo. the rules are the engine own two and none is new: an /ingest keeps an attestation that verifies and whose change rides the same bundle and drops the rest without failing the push, and a pull serves one only with its change in the bundle being sent, so a caller already holding a change is not re-sent its attestations and a metadata-private repo needs no new rule. /stow keeps none, because it is also a proposer path and a stranger attestation must not write into the owner repo. migration 0019 adds the attestation table, repo-scoped, keyed on the engine dedupe triple so a re-push is a no-op and the first signature stands, with row security enabled and bound by the 0017 policy, and it joins the rls census, whose doc still said eight tables with ten listed and whose shipped-policy check named migrations by index - it now reads every migration from 0017 on. the driver sorts role COLLATE C, because the reference store orders by bytes and a text column otherwise sorts by the cluster collation. a bundle that sends changes pays one more batched read, so the two offer-cost pins move from 4 to 5 and a no-op pull still asks nothing. a late attestation on an already-pushed change still does not travel - that is #2251, in the engine and on every host - and a pin refuses the forge keeping one outside the bundle so that widening is done on purpose. red under mutation, counts read each time: keeping unverified attestations (0 passed and 1 failed), keeping them outside the bundle (0 passed and 1 failed), serving none (0 passed and 1 failed), a read that ignores the ask and a last-signature-wins upsert (1 passed and 1 failed each, the pg stamp skipping off-cluster), each restored to 1 and 2 passed; and on a throwaway Postgres 18 the COLLATE dropped failed the ordering case (0 passed and 1 failed) where the unmutated arm had passed, restored byte for byte. bash ci/local.sh is green against Postgres 18 (4200 passed over 134 binaries, 9 ignored), after one unrelated loot-cli flake on its first run, filed as #2258. migration 0019 rides the forge binary and nothing on the wire or in a format moves, so this owes a forge deploy (#2250) 97ace3ec · dbf3dbe6…

Renames are not followed. loot's tree maps a path to an address, so a rename is a delete and an add. This list is the history of the name, not of the bytes.