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/2025-11-05-excitor-consensus-beta.md

@@ -0,0 +1,12 @@
+# 2025-11-05 – Excitor consensus API beta
+
+**Subject:** Excitor consensus export/API preview ships  \
+**Audience:** Docs Guild, VEX Lens Guild, Policy Engine Guild, Export Center Guild
+
+- Published `docs/modules/excitor/README.md` update capturing the Link-Not-Merge consensus milestone and pointing to the beta API surface.
+- Added `docs/vex/consensus-json.md` sample describing the canonical `consensus_state` payload (`rollupStatus`, `sources[]`, `policyRevisionId`, `consensusDigest`) emitted by the preview endpoint.
+- Documented DSSE packaging plus Export Center hooks so attested consensus bundles can ride along with devportal/offline exports once Excitor workers emit DSSE manifests (`docs/modules/export-center/devportal-offline.md`).
+
+**Follow-ups**
+- [ ] Coordinate with Policy Engine (`POLICY-ENGINE-30-101`) to reference consensus policy weighting knobs before GA.
+- [ ] Produce CLI quickstart once `stella vex consensus` verbs land (CLI backlog `CLI-VEX-30-002`).