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semi implemented and features implemented save checkpoint

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# Binary-Level SCA and Provenance
## Module
Attestor
## Status
IMPLEMENTED
## Description
Binary fingerprint evidence generation, binary identity and vulnerability matching info, and native binary hardening analysis for PE, ELF, and Mach-O formats.
## Implementation Details
- **Binary Fingerprint Evidence**: `src/Attestor/__Libraries/StellaOps.Attestor.ProofChain/Generators/BinaryFingerprintEvidenceGenerator.cs` (with `.Helpers`) -- generates attestable evidence from binary SCA results.
- **Binary Identity**: `__Libraries/StellaOps.Attestor.ProofChain/Predicates/BinaryIdentityInfo.cs` -- captures binary identity: file path, SHA-256 digest, binary format (PE/ELF/Mach-O), architecture, and version info.
- **Vulnerability Matching**: `BinaryVulnMatchInfo.cs` -- links binary identity to CVE matches with match type and confidence score.
- **Binary Fingerprint Predicate**: `BinaryFingerprintEvidencePredicate.cs` -- attestable predicate wrapping binary SCA results.
- **Micro-Witness Evidence**: `MicroWitnessBinaryRef.cs`, `MicroWitnessCveRef.cs`, `MicroWitnessFunctionEvidence.cs`, `MicroWitnessSbomRef.cs` -- fine-grained evidence linking binary analysis to SBOM components and CVEs.
- **Binary Diff for Provenance**: `src/Attestor/__Libraries/StellaOps.Attestor.StandardPredicates/BinaryDiff/BinaryDiffSectionModels.cs` -- section-level diff models for PE (.text, .rdata) and ELF (.text, .rodata) sections.
- **SLSA Provenance Integration**: `src/Attestor/__Libraries/StellaOps.Attestor.StandardPredicates/Parsers/SlsaProvenancePredicateParser.cs` -- parses SLSA provenance predicates that include build materials (binaries).
- **Note**: Actual binary hardening analysis (DEP, ASLR, stack canaries, etc.) lives in `src/Scanner/` and `src/BinaryIndex/`.
## E2E Test Plan
- [ ] Generate binary SCA evidence for a PE binary and verify `BinaryIdentityInfo` captures format as PE with correct architecture
- [ ] Generate evidence for an ELF binary and verify format detection
- [ ] Create `BinaryVulnMatchInfo` linking a binary identity to a CVE and verify match details (CVE ID, confidence, match type)
- [ ] Create micro-witness evidence with `MicroWitnessSbomRef` linking binary analysis results to SBOM component entries
- [ ] Generate a binary diff between two binary versions and verify section-level changes are captured in `BinaryDiffSectionModels`
- [ ] Verify binary fingerprint evidence integrates with SLSA provenance by including binary digests in build materials
- [ ] Sign binary SCA evidence as a DSSE attestation and verify the signature covers the complete `BinaryFingerprintEvidencePredicate`