Schema v7 -> v8, the graph API break, and the gates.

concepts gains rowid_pk INTEGER PRIMARY KEY and concepts_fts is re-keyed onto
it (D-119); trg_concepts_fts_delete ships inert, ahead of the 0.9.0 archival
that makes it fire. Two unread indices dropped, -7.9% off assert_edge (D-118).
Subgraph, NodeData and EdgeRef move behind accessors (D-114) and EdgeRef is
interned, 5.8x-6.8x smaller per edge (D-115). content leaves the default load
(D-116, D-123). reconstruct below the log floor is no longer a corruption
(D-121). Section 9's budgets re-measured against two controls (D-127).

Tagged retroactively on 2026-08-07 at the pre-tag commit that closed the
release record.