Add inline DSSE provenance documentation and Mongo schema

- Introduced a new document outlining the inline DSSE provenance for SBOM, VEX, scan, and derived events.
- Defined the Mongo schema for event patches, including key fields for provenance and trust verification.
- Documented the write path for ingesting provenance metadata and backfilling historical events.
- Created CI/CD snippets for uploading DSSE attestations and generating provenance metadata.
- Established Mongo indexes for efficient provenance queries and provided query recipes for various use cases.
- Outlined policy gates for managing VEX decisions based on provenance verification.
- Included UI nudges for displaying provenance information and implementation tasks for future enhancements.

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Implement reachability lattice and scoring model

- Developed a comprehensive document detailing the reachability lattice and scoring model.
- Defined core types for reachability states, evidence, and mitigations with corresponding C# models.
- Established a scoring policy with base score contributions from various evidence classes.
- Mapped reachability states to VEX gates and provided a clear overview of evidence sources.
- Documented the event graph schema for persisting reachability data in MongoDB.
- Outlined the integration of runtime probes for evidence collection and defined a roadmap for future tasks.

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Introduce uncertainty states and entropy scoring

- Created a draft document for tracking uncertainty states and their impact on risk scoring.
- Defined core uncertainty states with associated entropy values and evidence requirements.
- Established a schema for storing uncertainty states alongside findings.
- Documented the risk score calculation incorporating uncertainty and its effect on final risk assessments.
- Provided policy guidelines for handling uncertainty in decision-making processes.
- Outlined UI guidelines for displaying uncertainty information and suggested remediation actions.

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Add Ruby package inventory management

- Implemented Ruby package inventory management with corresponding data models and storage mechanisms.
- Created C# records for Ruby package inventory, artifacts, provenance, and runtime details.
- Developed a repository for managing Ruby package inventory documents in MongoDB.
- Implemented a service for storing and retrieving Ruby package inventories.
- Added unit tests for the Ruby package inventory store to ensure functionality and data integrity.

docs/implplan/SPRINT_138_scanner_ruby_parity.md

@@ -30,3 +30,5 @@
 - `SCANNER-ENG-0016`: 2025-11-10 — Completed Ruby lock collector and vendor ingestion work: honour `.bundle/config` overrides, fold workspace lockfiles, emit bundler groups, add Ruby analyzer fixtures/goldens (including new git/path offline kit mirror), and `dotnet test ... --filter Ruby` passes.
 - `SCANNER-ENG-0009`: Emitted observation payload + `ruby-observation` component summarising packages, runtime edges, and capability flags for Policy/Surface exports; fixtures updated for determinism and Offline Kit now ships the observation JSON.
 - `SCANNER-ENG-0009`: 2025-11-12 — Added bundler-version metadata to observation payloads, introduced the `complex-app` fixture to cover vendor caches/BUNDLE_PATH overrides, and taught `stellaops-cli ruby inspect` to print the observation banner (bundler/runtime/capabilities) alongside JSON `observation` blocks.
+- `SCANNER-ENG-0009`: 2025-11-12 — Ruby package inventories now flow into `RubyPackageInventoryStore`; `SurfaceManifestStageExecutor` builds the package list, persists it via Mongo, and Scanner.WebService exposes the data through `GET /api/scans/{scanId}/ruby-packages` for CLI/Policy consumers.
+- `SCANNER-ENG-0009`: 2025-11-12 — Ruby package inventory API now returns a typed envelope (scanId/imageDigest/generatedAt + packages) backed by `ruby.packages`; Worker/WebService DI registers the real store when Mongo is enabled, CLI `ruby resolve` consumes the new payload/warns when inventories are still warming, and docs/OpenAPI references were refreshed.