semi implemented and features implemented save checkpoint

docs/features/unchecked/scanner/progressive-fidelity-scan-mode.md

@@ -0,0 +1,24 @@
+# Progressive Fidelity Scan Mode (Quick/Standard/Deep)
+
+## Module
+Scanner
+
+## Status
+IMPLEMENTED
+
+## Description
+Allows users to select scan depth (Quick/Standard/Deep) with a FidelityAwareAnalyzer that adjusts analysis precision and an upgrade endpoint to promote results to higher fidelity. Distinct from "Tiered Scanner Precision" which describes imported/executed/tainted-sink PR-AUC tiers -- this is about user-selectable scan depth modes.
+
+## Implementation Details
+- **Fidelity-Aware Analyzer**:
+  - `src/Scanner/__Libraries/StellaOps.Scanner.Orchestration/Fidelity/FidelityAwareAnalyzer.cs` - `FidelityAwareAnalyzer` adjusts analysis precision based on the selected scan depth mode (Quick/Standard/Deep)
+- **Fidelity Endpoints**:
+  - `src/Scanner/StellaOps.Scanner.WebService/Endpoints/FidelityEndpoints.cs` - `FidelityEndpoints` provides API for selecting scan depth and upgrading scan results to higher fidelity
+
+## E2E Test Plan
+- [ ] Trigger a Quick scan and verify it completes faster with reduced analysis depth (SBOM only, no reachability)
+- [ ] Trigger a Standard scan and verify it includes SBOM generation plus basic vulnerability matching
+- [ ] Trigger a Deep scan and verify it includes full reachability analysis, call graph extraction, and binary intelligence
+- [ ] Use the upgrade endpoint to promote Quick scan results to Standard and verify additional analysis is performed
+- [ ] Use the upgrade endpoint to promote Standard to Deep and verify full reachability analysis is appended
+- [ ] Verify the selected scan depth is recorded in scan metadata for auditability