feat: Implement vulnerability token signing and verification utilities

- Added VulnTokenSigner for signing JWT tokens with specified algorithms and keys.
- Introduced VulnTokenUtilities for resolving tenant and subject claims, and sanitizing context dictionaries.
- Created VulnTokenVerificationUtilities for parsing tokens, verifying signatures, and deserializing payloads.
- Developed VulnWorkflowAntiForgeryTokenIssuer for issuing anti-forgery tokens with configurable options.
- Implemented VulnWorkflowAntiForgeryTokenVerifier for verifying anti-forgery tokens and validating payloads.
- Added AuthorityVulnerabilityExplorerOptions to manage configuration for vulnerability explorer features.
- Included tests for FilesystemPackRunDispatcher to ensure proper job handling under egress policy restrictions.

docs/benchmarks/scanner/deep-dives/matrix.md

@@ -13,7 +13,8 @@
 | Rust | Binary heuristics | StellaOps | Fingerprint coverage incomplete for niche toolchains. | Unmatched binaries ignored; no fallback crates. | No fallback for binaries lacking Cargo metadata; depends on Syft crate data. | No Rust/Cargo support in CLI plugins. | Execute Rust fingerprint plan (`scanning-gaps-stella-misses-from-competitors.md`) and update analyzer backlog. | [rust.md](rust.md) |
 | OS packages | Linux distro coverage & provenance | Tie (StellaOps / Grype) | Requires RustFS/object store deployment for full replay; Windows packaging still out of scope. | No per-layer fragment storage; provenance limited; Windows support likewise minimal. | No per-layer provenance; shares Syft catalog and Anchore DB only. | Snyk Container scanning depends on SaaS API; no per-layer provenance. | Document RustFS dependency & offline alternatives in ops backlog; evaluate Windows pkg roadmap. | [os-packages.md](os-packages.md) |
 | OS packages | Linux flavor support (Alpine/Wolfi/Chainguard, Debian/Ubuntu, RHEL/Alma/Rocky, SUSE, Amazon/Bottlerocket) | Tie (Trivy / Snyk) | Windows/macOS package ecosystems still pending. | Coverage relies on package DB adapters; per-distro nuances (e.g., Chainguard signatures) not attested. | Supports major Linux feeds but no Windows/macOS package analyzers. | Supports documented distro list via Snyk Container but requires cloud connectivity. | Track demand for non-Linux package analyzers; document distro mapping in os-packages deep dive. | [os-packages.md](os-packages.md) |
-| OS packages | Windows/macOS coverage | — | No Windows/macOS analyzer; backlog item for offline parity. | Coverage docs enumerate Linux distributions only; Windows/macOS packages unsupported. | Syft matchers focus on Linux ecosystems; Windows/macOS packages unsupported. | Coverage depends on Snyk’s SaaS service; no offline assurance for Windows/macOS packages. | Capture demand for Windows/macOS analyzers (see `docs/benchmarks/scanner/windows-macos-demand.md`) and scope feasibility. | [os-packages.md](os-packages.md) |
+| macOS packages | Coverage & provenance | StellaOps (future) | macOS analyzer not implemented yet; design captured in deep dive. | No macOS analyzers (Linux only). | No macOS analyzers (Linux only). | No macOS host scanning; SaaS container focus only. | Advance demand capture (`windows-macos-demand.md`); open macOS design spike once threshold met. | [macos.md](macos.md) |
+| Windows packages | Coverage & provenance | StellaOps (future) | Windows analyzer family not yet implemented; design brief in progress. | No Windows coverage beyond containers. | Syft/Grype lack Windows collectors; Anchore feeds Linux-only. | SaaS host scanning only; no offline or deterministic evidence. | Capture demand signals; scope Windows analyzer spike when thresholds met. | [windows.md](windows.md) |
 | Secrets | Handling posture | StellaOps | No leak scanning by design; Surface.Secrets manages retrieval/rotation with tenant scopes. | Leak detections lack governance hooks; operators must track rule updates. | No secret management abstraction; credentials configured manually. | Requires SaaS backend for secret scanning; no offline posture or secret storage guidance. | Document governance patterns for Surface.Secrets users and recommended companion tooling. | [secrets.md](secrets.md) |
 | Secrets | Detection technique | Trivy | No content scanning; relies on Surface.Secrets integrations. | Regex/entropy detectors with configurable allow/deny lists across files/bytecode. | No detector available; Syft/Grype skip leak scanning entirely. | Snyk Code/Snyk secrets require uploading code to SaaS; offline detection unavailable. | Execute secrets leak detection plan (`scanning-gaps-stella-misses-from-competitors.md`) and plan policy templates. | [secrets.md](secrets.md) |
 | EntryTrace | Runtime command resolution | StellaOps | Shell/language launcher coverage needs continuous tuning. | Not supported. | Not available. | Not available. | Maintain EntryTrace plan (`scanning-gaps-stella-misses-from-competitors.md`) and backlog cadence. | — |