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/implplan/SPRINT_120_policy_reasoning.md

@@ -5,10 +5,10 @@ Depends on: Sprint 110.A - AdvisoryAI
 Summary: Policy & Reasoning focus on AirGap).
 Task ID | State | Task description | Owners (Source)
 --- | --- | --- | ---
-AIRGAP-POL-56-001 | TODO | Implement `StellaOps.AirGap.Policy` package exposing `EgressPolicy` facade with sealed/unsealed branches and remediation-friendly errors. | AirGap Policy Guild (src/AirGap/StellaOps.AirGap.Policy/TASKS.md)
-AIRGAP-POL-56-002 | TODO | Create Roslyn analyzer/code fix warning on raw `HttpClient` usage outside approved wrappers; add CI integration. Dependencies: AIRGAP-POL-56-001. | AirGap Policy Guild, DevEx Guild (src/AirGap/StellaOps.AirGap.Policy/TASKS.md)
-AIRGAP-POL-57-001 | TODO | Update core web services (Web, Exporter, Policy, Findings, Authority) to use `EgressPolicy`; ensure configuration wiring for sealed mode. Dependencies: AIRGAP-POL-56-002. | AirGap Policy Guild, BE-Base Platform Guild (src/AirGap/StellaOps.AirGap.Policy/TASKS.md)
-AIRGAP-POL-57-002 | TODO | Implement Task Runner job plan validator rejecting network steps unless marked internal allow-list. Dependencies: AIRGAP-POL-57-001. | AirGap Policy Guild, Task Runner Guild (src/AirGap/StellaOps.AirGap.Policy/TASKS.md)
+AIRGAP-POL-56-001 | DONE | Implement `StellaOps.AirGap.Policy` package exposing `EgressPolicy` facade with sealed/unsealed branches and remediation-friendly errors. | AirGap Policy Guild (src/AirGap/StellaOps.AirGap.Policy/TASKS.md)
+AIRGAP-POL-56-002 | DONE | Create Roslyn analyzer/code fix warning on raw `HttpClient` usage outside approved wrappers; add CI integration. Dependencies: AIRGAP-POL-56-001. | AirGap Policy Guild, DevEx Guild (src/AirGap/StellaOps.AirGap.Policy/TASKS.md)
+AIRGAP-POL-57-001 | DONE (2025-11-03) | Update core web services (Web, Exporter, Policy, Findings, Authority) to use `EgressPolicy`; ensure configuration wiring for sealed mode. Dependencies: AIRGAP-POL-56-002. | AirGap Policy Guild, BE-Base Platform Guild (src/AirGap/StellaOps.AirGap.Policy/TASKS.md)
+AIRGAP-POL-57-002 | DONE (2025-11-03) | Implement Task Runner job plan validator rejecting network steps unless marked internal allow-list.<br>2025-11-03: Worker wiring pulls `IEgressPolicy`, filesystem dispatcher enforces sealed-mode egress, dispatcher test + grant normalization landed, package versions aligned to rc.2.<br>Next: ensure other dispatchers/executors reuse the injected policy before enabling sealed-mode runs in worker service. Dependencies: AIRGAP-POL-57-001. | AirGap Policy Guild, Task Runner Guild (src/AirGap/StellaOps.AirGap.Policy/TASKS.md)
 AIRGAP-POL-58-001 | TODO | Ensure Observability exporters only target local endpoints in sealed mode; disable remote sinks with warning. Dependencies: AIRGAP-POL-57-002. | AirGap Policy Guild, Observability Guild (src/AirGap/StellaOps.AirGap.Policy/TASKS.md)
 AIRGAP-POL-58-002 | TODO | Add CLI sealed-mode guard that refuses commands needing egress and surfaces remediation. Dependencies: AIRGAP-POL-58-001. | AirGap Policy Guild, CLI Guild (src/AirGap/StellaOps.AirGap.Policy/TASKS.md)
 
@@ -226,7 +226,7 @@ Task ID | State | Task description | Owners (Source)
 RISK-ENGINE-66-001 | TODO | Scaffold scoring service (job queue, worker loop, provider registry) with deterministic execution harness. | Risk Engine Guild (src/RiskEngine/StellaOps.RiskEngine/TASKS.md)
 RISK-ENGINE-66-002 | TODO | Implement default transforms (linear, minmax, logistic, piecewise), clamping, gating, and contribution calculator. Dependencies: RISK-ENGINE-66-001. | Risk Engine Guild (src/RiskEngine/StellaOps.RiskEngine/TASKS.md)
 RISK-ENGINE-67-001 | TODO | Integrate CVSS and KEV providers pulling data from Conseiller; implement reducers (`max`, `any`, `consensus`). Dependencies: RISK-ENGINE-66-002. | Risk Engine Guild, Concelier Guild (src/RiskEngine/StellaOps.RiskEngine/TASKS.md)
-RISK-ENGINE-67-002 | TODO | Integrate VEX gate provider and ensure gating short-circuits scoring as configured. Dependencies: RISK-ENGINE-67-001. | Risk Engine Guild, Excitator Guild (src/RiskEngine/StellaOps.RiskEngine/TASKS.md)
+RISK-ENGINE-67-002 | TODO | Integrate VEX gate provider and ensure gating short-circuits scoring as configured. Dependencies: RISK-ENGINE-67-001. | Risk Engine Guild, Excitor Guild (src/RiskEngine/StellaOps.RiskEngine/TASKS.md)
 RISK-ENGINE-67-003 | TODO | Add fix availability, asset criticality, and internet exposure providers with caching + TTL enforcement. Dependencies: RISK-ENGINE-67-002. | Risk Engine Guild, Policy Engine Guild (src/RiskEngine/StellaOps.RiskEngine/TASKS.md)
 RISK-ENGINE-68-001 | TODO | Persist scoring results + explanation pointers to Findings Ledger; handle incremental updates via input hash. Dependencies: RISK-ENGINE-67-003. | Risk Engine Guild, Findings Ledger Guild (src/RiskEngine/StellaOps.RiskEngine/TASKS.md)
 RISK-ENGINE-68-002 | TODO | Expose APIs (`/risk/jobs`, `/risk/results`, `/risk/results/{id}/explanation`); include pagination, filtering, error codes. Dependencies: RISK-ENGINE-68-001. | Risk Engine Guild, API Guild (src/RiskEngine/StellaOps.RiskEngine/TASKS.md)