Use pinned, governed pages for metadata, content, vectors and topology.
Preflight identity/content/model prerequisites before writes and continue
independent records without softening authentication, capacity or I/O errors.
Apply topology deletions, nodes and edges in one real KG batch with bounded
transaction-local reads. Preserve ordinary-read isolation, report exact edge
deferrals independently of bounded diagnostic samples and avoid empty commits.
Retract absent local topology only from exact committed own observations and
conditionally erase the same envelope, including off-resident/stale-winner
regressions. Probe local KG presence with fallible scalar SQL rather than
materializing properties; retain SQL errors as errors, not absent records.
The public C++ KG/batch interfaces gain virtual capabilities. Defaults provide
source-level hard errors only: installed/old-binary ABI compatibility is NOT
established and providers must be rebuilt/reviewed before promotion.
Signed-off-by: trvon <git@trevon.dev>