semi implemented and features implemented save checkpoint

docs/features/dropped/time-to-evidence-metric.md

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+# Time-to-Evidence (TTE) Metric
+
+## Status
+PARTIALLY_IMPLEMENTED
+
+## Description
+The TTE metric (measuring time from finding open to first proof rendered) is not implemented in the frontend or backend.
+
+## Module
+Telemetry
+
+## What's Implemented
+- **TTE metrics collection**: `src/Telemetry/StellaOps.Telemetry.Core/StellaOps.Telemetry.Core/TimeToEvidenceMetrics.cs`
+- **Percentile exporter**: `src/Telemetry/StellaOps.Telemetry.Core/StellaOps.Telemetry.Core/TtePercentileExporter.cs` (P50/P90/P99)
+- **Scan completion integration**: `src/Telemetry/StellaOps.Telemetry.Core/StellaOps.Telemetry.Core/ScanCompletionMetricsIntegration.cs`
+- **Attestation metrics**: `src/Telemetry/StellaOps.Telemetry.Core/StellaOps.Telemetry.Core/Metrics/AttestationMetrics.cs`
+- **DI registration**: `src/Telemetry/StellaOps.Telemetry.Core/StellaOps.Telemetry.Core/TelemetryServiceCollectionExtensions.cs`
+- **Baseline tracking**: `src/__Tests/__Benchmarks/baselines/ttfs-baseline.json`
+
+## What's Missing
+- Frontend visualization of TTE metrics (dashboard/chart in Web UI)
+- TTE trend visualization over time
+- Per-finding TTE breakdown in the UI
+
+## Implementation Plan
+- Add TTE dashboard widget to Web UI
+- Show TTE percentile trends over time
+- Include TTE metric in finding detail view
+
+## Source
+- Feature matrix scan