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.

src/Authority/StellaOps.Authority/TASKS.completed.md

@@ -11,7 +11,7 @@
 | AUTH-GRAPH-21-002 | DONE (2025-10-26) | Authority Core & Security Guild | AUTH-GRAPH-21-001, AUTH-AOC-19-002 | Wire gateway enforcement for new graph scopes, Cartographer service identity, and tenant propagation across graph APIs. | Gateway config updated; unauthorized access blocked in integration tests; audit logs include graph scope usage. |
 | AUTH-GRAPH-21-003 | DONE (2025-10-26) | Authority Core & Docs Guild | AUTH-GRAPH-21-001 | Update security docs and samples describing graph access roles, least privilege guidance, and service identities. | Docs merged with compliance checklist; examples refreshed; release notes prepared. |
 | AUTH-POLICY-23-001 | DONE (2025-10-29) | Authority Core & Security Guild | AUTH-POLICY-20-001 | Introduce fine-grained scopes `policy:read`, `policy:edit`, `policy:approve`, `policy:activate`, `policy:simulate`; update issuer templates and metadata. | Scopes exposed; integration tests confirm enforcement; offline kit updated. |
-| AUTH-VULN-24-001 | DONE (2025-10-29) | Authority Core & Security Guild | AUTH-GRAPH-21-001 | Extend scopes to include `vuln:read` and signed permalinks with scoped claims for Vuln Explorer; update metadata. | Scopes published; permalinks validated; integration tests cover RBAC. |
+| AUTH-VULN-24-001 | DONE (2025-10-29) | Authority Core & Security Guild | AUTH-GRAPH-21-001 | Extend Vuln Explorer scopes (`vuln:view`, `vuln:investigate`, `vuln:operate`, `vuln:audit`) and signed permalinks with scoped claims for Vuln Explorer; update metadata. | Scopes published; permalinks validated; integration tests cover RBAC. |
 | AUTH-ORCH-32-001 | DONE (2025-10-31) | Authority Core & Security Guild | — | Define `orch:read` scope, register `Orch.Viewer` role, update discovery metadata, and seed offline defaults. | Scope/role available in metadata; integration tests confirm read-only enforcement; offline kit updated. |
 | AUTH-CONSOLE-23-001 | DONE (2025-10-29) | Authority Core & Security Guild | AUTH-POLICY-20-001 | Register StellaOps Console confidential client with OIDC PKCE support, short-lived ID/access tokens, `console:*` audience claims, and SPA-friendly refresh (token exchange endpoint). Publish discovery metadata + offline kit defaults. | Client registration committed; configuration templates updated; integration tests validate PKCE + scope issuance; security review recorded. |
 | AUTH-POLICY-27-001 | DONE (2025-10-31) | Authority Core & Security Guild | AUTH-POLICY-20-001, AUTH-CONSOLE-23-001 | Define Policy Studio roles (`policy:author`, `policy:review`, `policy:approve`, `policy:operate`, `policy:audit`) with tenant-scoped claims, update issuer metadata, and seed offline kit defaults. | Scopes/roles exposed via discovery docs; tokens issued with correct claims; integration tests cover role combinations; docs updated. |