feat: Add VEX compact fixture and implement offline verifier for Findings Ledger exports

- Introduced a new VEX compact fixture for testing purposes.
- Implemented `verify_export.py` script to validate Findings Ledger exports, ensuring deterministic ordering and applying redaction manifests.
- Added a lightweight stub `HarnessRunner` for unit tests to validate ledger hashing expectations.
- Documented tasks related to the Mirror Creator.
- Created models for entropy signals and implemented the `EntropyPenaltyCalculator` to compute penalties based on scanner outputs.
- Developed unit tests for `EntropyPenaltyCalculator` to ensure correct penalty calculations and handling of edge cases.
- Added tests for symbol ID normalization in the reachability scanner.
- Enhanced console status service with comprehensive unit tests for connection handling and error recovery.
- Included Cosign tool version 2.6.0 with checksums for various platforms.

docs/implplan/SPRINT_0512_0001_0001_bench.md

@@ -25,8 +25,8 @@
 | P4 | PREP-BENCH-POLICY-20-002-POLICY-DELTA-SAMPLE | DONE (2025-11-20) | Due 2025-11-26 · Accountable: Bench Guild · Policy Guild · Scheduler Guild | Bench Guild · Policy Guild · Scheduler Guild | Prep artefact published at `docs/benchmarks/policy/bench-policy-20-002-prep.md` (baseline + delta datasets, deterministic harness plan, metrics). |
 | 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 | 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. |
+| 1 | BENCH-GRAPH-21-001 | DONE (2025-12-02) | 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 | DONE (2025-12-02) | 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. |
@@ -76,6 +76,7 @@
 ## Execution Log
 | Date (UTC) | Update | Owner |
 | --- | --- | --- |
+| 2025-12-02 | Marked BENCH-GRAPH-21-001/002 DONE after overlay-capable harness, SHA capture, UI driver metadata, and deterministic tests; runs still use synthetic fixtures until SAMPLES-GRAPH-24-003 arrives. | Implementer |
 | 2025-11-27 | Added offline runner `Determinism/offline_run.sh` with manifest verification toggle; updated bench doc offline workflow. | Bench Guild |
 | 2025-11-27 | Added feeds placement note (`Determinism/inputs/feeds/README.md`) and linked in bench offline workflow. | Bench Guild |
 | 2025-11-27 | Added sample manifest `inputs/inputs.sha256` for bundled demo SBOM/VEX/config; documented in bench README and offline workflow. | Bench Guild |
@@ -91,6 +92,7 @@
 | 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 |
+| 2025-12-02 | Extended graph bench harness with optional overlay support + SHA capture, updated UI driver to emit trace/viewport metadata, and added deterministic tests (`graph/tests/test_graph_bench.py`, `ui_bench_driver.test.mjs`). | 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 |