docs: retain late-slope guard control receipts

scripts/validation/opcua-lifecycle-memory/LATE_SLOPE.md

@@ -47,7 +47,7 @@ have at least 10 samples, first sample no later than 60s after its start, last s
 no earlier than 60s before its end, observed span at least 480s, and no internal gap
 above 60s. Apply the same 60s maximum gap over the entire 1800–7200s reporting range.
 Missing coverage is incomplete evidence; it must not become a favorable slope.
-If fewer than 385 cycles and 96 restarts complete by 1800s, report the elapsed
+Unless at least 385 cycles and 96 restarts complete by 1800s, report the elapsed
 slopes descriptively but withhold attribution to the phase after the previously
 observed restart milestone. Reaching that count still does not prove factory
 saturation in this run; no EventPipe observer is attached.
@@ -85,3 +85,9 @@ Require negative controls proving a latched first failure cannot disappear,
 wrong duration/mode is rejected, no ordinary acceptance receipt can be emitted,
 and malformed/missing sample windows fail the summarizer. Review actual source,
 control results and every immutable artifact hash with Astra before launch.
+
+The canonical mode is implemented. The [short control receipts](../../../docs/plans/evidence/2026-11-10-opcua2/late-slope-controls.json)
+record three passing helper tests and actual rejection of a 90-second request
+before setup. The original helper assertion-capture failure is retained; the
+canonical source is byte-identical across that test-only correction. These
+controls do not approve a bundle, start the workload or satisfy #799.