semi implemented and features implemented save checkpoint

docs/features/unchecked/excititor/vex-claims-resolution-engine.md

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+# VEX Claims Resolution Engine (Multi-Source Merge)
+
+## Module
+Excititor
+
+## Status
+IMPLEMENTED
+
+## Description
+Multi-source VEX claim resolution with policy-controlled merge semantics resolving conflicts between vendor, distro, internal, and scanner claims into a deterministic resolved status.
+
+## Implementation Details
+- **Modules**: `src/Excititor/__Libraries/StellaOps.Excititor.Core/`
+- **Key Classes**:
+  - `VexConsensusResolver` (`src/Excititor/__Libraries/StellaOps.Excititor.Core/VexConsensusResolver.cs`) - resolves multi-source VEX claims into consensus
+  - `BaselineVexConsensusPolicy` (`src/Excititor/__Libraries/StellaOps.Excititor.Core/BaselineVexConsensusPolicy.cs`) - baseline policy for consensus resolution
+  - `VexConsensusPolicyOptions` (`src/Excititor/__Libraries/StellaOps.Excititor.Core/VexConsensusPolicyOptions.cs`) - configurable policy options for merge semantics
+  - `VexConsensus` (`src/Excititor/__Libraries/StellaOps.Excititor.Core/VexConsensus.cs`) - resolved consensus model
+  - `VexConsensusHold` (`src/Excititor/__Libraries/StellaOps.Excititor.Core/VexConsensusHold.cs`) - holds on consensus when manual review is needed
+  - `ClaimScoreMerger` (`src/Excititor/__Libraries/StellaOps.Excititor.Core/Lattice/ClaimScoreMerger.cs`) - merges claim scores from multiple sources
+  - `PolicyLatticeAdapter` (`src/Excititor/__Libraries/StellaOps.Excititor.Core/Lattice/PolicyLatticeAdapter.cs`) - adapts policy lattice rules for VEX merge
+  - `TrustWeightRegistry` (`src/Excititor/__Libraries/StellaOps.Excititor.Core/Lattice/TrustWeightRegistry.cs`) - registry of trust weights per source
+- **Interfaces**: `IVexConsensusPolicy`, `IVexLatticeProvider`
+- **Source**: Feature matrix scan
+
+## E2E Test Plan
+- [ ] Submit conflicting VEX claims (vendor says "fixed", distro says "affected") and verify `VexConsensusResolver` resolves deterministically based on policy
+- [ ] Verify `BaselineVexConsensusPolicy` applies default merge rules when no custom policy is configured
+- [ ] Verify `ClaimScoreMerger` weights claims by trust level when merging scores
+- [ ] Verify `VexConsensusHold` is triggered when claims conflict and manual review is required by policy
+- [ ] Verify `TrustWeightRegistry` applies different weights to vendor, distro, internal, and scanner sources
+- [ ] Verify resolution is deterministic: same inputs always produce the same consensus output