feat: Add UI benchmark driver and scenarios for graph interactions

- Introduced `ui_bench_driver.mjs` to read scenarios and fixture manifest, generating a deterministic run plan.
- Created `ui_bench_plan.md` outlining the purpose, scope, and next steps for the benchmark.
- Added `ui_bench_scenarios.json` containing various scenarios for graph UI interactions.
- Implemented tests for CLI commands, ensuring bundle verification and telemetry defaults.
- Developed schemas for orchestrator components, including replay manifests and event envelopes.
- Added mock API for risk management, including listing and statistics functionalities.
- Implemented models for risk profiles and query options to support the new API.

docs/implplan/SPRINT_0512_0001_0001_bench.md

@@ -26,7 +26,7 @@
 | P5 | PREP-BENCH-SIG-26-001-REACHABILITY-SCHEMA-FIX | DONE (2025-11-20) | Prep doc at `docs/benchmarks/signals/bench-sig-26-001-prep.md`; awaits reachability schema hash. | Bench Guild · Signals Guild | Reachability schema/fixtures pending Sprint 0400/0401. <br><br> Document artefact/deliverable for BENCH-SIG-26-001 and publish location so downstream tasks can proceed. |
 | P6 | PREP-BENCH-SIG-26-002-BLOCKED-ON-26-001-OUTPU | DONE (2025-11-20) | Prep doc at `docs/benchmarks/signals/bench-sig-26-002-prep.md`; depends on 26-001 datasets. | Bench Guild · Policy Guild | Blocked on 26-001 outputs. <br><br> Document artefact/deliverable for BENCH-SIG-26-002 and publish location so downstream tasks can proceed. |
 | 1 | BENCH-GRAPH-21-001 | DOING (2025-12-01) | PREP-BENCH-GRAPH-21-001-NEED-GRAPH-BENCH-HARN | Bench Guild · Graph Platform Guild | Build graph viewport/path benchmark harness (50k/100k nodes) measuring Graph API/Indexer latency, memory, and tile cache hit rates. |
-| 2 | BENCH-GRAPH-21-002 | BLOCKED | PREP-BENCH-GRAPH-21-002-BLOCKED-ON-21-001-HAR | Bench Guild · UI Guild | Add headless UI load benchmark (Playwright) for graph canvas interactions to track render times and FPS budgets. |
+| 2 | BENCH-GRAPH-21-002 | DOING (2025-12-01) | PREP-BENCH-GRAPH-21-002-BLOCKED-ON-21-001-HAR | Bench Guild · UI Guild | Add headless UI load benchmark (Playwright) for graph canvas interactions to track render times and FPS budgets. |
 | 3 | BENCH-GRAPH-24-002 | BLOCKED | Waiting for 50k/100k graph fixture (SAMPLES-GRAPH-24-003) | Bench Guild · UI Guild | Implement UI interaction benchmarks (filter/zoom/table operations) citing p95 latency; integrate with perf dashboards. |
 | 4 | BENCH-IMPACT-16-001 | BLOCKED | PREP-BENCH-IMPACT-16-001-IMPACT-INDEX-DATASET | Bench Guild · Scheduler Team | ImpactIndex throughput bench (resolve 10k productKeys) + RAM profile. |
 | 5 | BENCH-POLICY-20-002 | BLOCKED | PREP-BENCH-POLICY-20-002-POLICY-DELTA-SAMPLE | Bench Guild · Policy Guild · Scheduler Guild | Add incremental run benchmark measuring delta evaluation vs full; capture SLA compliance. |
@@ -89,6 +89,8 @@
 | 2025-11-26 | Added `scripts/bench/determinism-run.sh` and CI workflow `.gitea/workflows/bench-determinism.yml` to run/upload determinism artifacts. | Bench Guild |
 | 2025-11-26 | Built determinism bench harness with mock scanner at `src/Bench/StellaOps.Bench/Determinism`, added sample SBOM/VEX inputs, generated `results/inputs.sha256` + `results.csv`, updated bench doc, and marked BENCH-DETERMINISM-401-057 DONE. Tests: `python -m unittest discover -s src/Bench/StellaOps.Bench/Determinism/tests -t src/Bench/StellaOps.Bench/Determinism`. | Bench Guild |
 | 2025-12-01 | Generated interim synthetic graph fixtures (50k/100k nodes with manifests) under `samples/graph/interim/` to unblock BENCH-GRAPH-21-001; task moved to DOING pending overlay schema for canonical fixture. | Implementer |
+| 2025-12-01 | Added Graph UI bench scaffold: scenarios JSON, driver (`ui_bench_driver.mjs`), and plan under `src/Bench/StellaOps.Bench/Graph/`; BENCH-GRAPH-21-002 moved to DOING using interim fixtures until overlay schema/UI target is available. | Implementer |
+| 2025-12-01 | Added graph bench runner `Graph/run_graph_bench.sh` and recorded sample results for graph-50k/100k fixtures; BENCH-GRAPH-21-001 progressing with interim fixtures. | Implementer |
 | 2025-11-22 | Added ACT-0512-07 and corresponding risk entry to have UI bench harness skeleton ready once fixtures bind; no status changes. | Project Mgmt |
 | 2025-11-22 | Added ACT-0512-04 to build interim synthetic graph fixture so BENCH-GRAPH-21-001 can start while awaiting SAMPLES-GRAPH-24-003; no status changes. | Project Mgmt |
 | 2025-11-22 | Added ACT-0512-05 escalation path (due 2025-11-23) if SAMPLES-GRAPH-24-003 remains unavailable; updated Upcoming Checkpoints accordingly. | Project Mgmt |