feat: Add comprehensive product advisories for improved scanner functionality

- Introduced a blueprint for explainable quiet alerts, detailing phases for SBOM, VEX readiness, and attestations.
- Developed a roadmap for deterministic diff-aware rescans, enhancing scanner speed and efficiency.
- Implemented a hash-based SBOM layer cache to optimize container scans by reusing previous results.
- Created a multi-runtime reachability corpus to validate function-level reachability across various programming languages.
- Proposed a stable SBOM model using SPDX 3.0.1 for persistence and CycloneDX 1.6 for interchange.
- Established a validation plan for quiet scans, focusing on provenance and CI integration.
- Documented guidelines for the Findings Ledger module, outlining roles, execution rules, and testing protocols.

docs/implplan/archived/updates/2025-11-03-vuln-explorer-access-controls.md

@@ -0,0 +1,5 @@
+# 2025-11-03 – Vuln Explorer access controls refresh
+
+- Expanded `docs/11_AUTHORITY.md` with attachment signing tokens, ledger verification workflow, and a Vuln Explorer security checklist.
+- Added scope guidance for attachment tokens in `docs/security/authority-scopes.md` and updated the Vuln Explorer architecture dossier.
+- Refreshed `etc/authority.yaml.sample` comments to highlight ABAC attributes and attachment token verification requirements.