Phase 29: add project benchmarks, endurance stress and callback safety checks

docs/ROADMAP.md

@@ -808,6 +808,21 @@ Establish measurable performance expectations and verify that larger projects re
 - No known real-time safety violation remains in the engine's own callback path.
 - Performance regressions can be detected by repeatable tests or benchmark reports.
 
+### Implementation status
+Implemented with the existing graph/capacity/fault infrastructure plus Phase 29
+project scaling matrices, CPU/RSS/deadline metrics, checked-in reports, virtual
+endurance, repeated reload/device/plugin fault suites, wider host callback guards
+and a combined development/sanitizer/static-analysis target. See PERFORMANCE.md
+for exact workloads, profiling evidence and qualification limits.
+
+Validation: normal core/GUI/JACK/plugin/recovery/recording suites, three-round
+CPU-contention stress, 2.282-hour virtual playback, minimal build, ASan/UBSan,
+static analysis and benchmark-gate regression tests passed. Project timing
+comparison passed. Graph comparisons detect shared-host variation (including a
+16-node mono/31-frame alert in a longer run); the prior baseline is retained and
+this limitation is recorded rather than suppressing the gate. Hardware and
+wall-clock endurance remain unqualified.
+
 ## Phase 30 — Release Engineering, Packaging, and Maintenance
 
 ### Goal