Add unit tests for SBOM ingestion and transformation

- Implement `SbomIngestServiceCollectionExtensionsTests` to verify the SBOM ingestion pipeline exports snapshots correctly.
- Create `SbomIngestTransformerTests` to ensure the transformation produces expected nodes and edges, including deduplication of license nodes and normalization of timestamps.
- Add `SbomSnapshotExporterTests` to test the export functionality for manifest, adjacency, nodes, and edges.
- Introduce `VexOverlayTransformerTests` to validate the transformation of VEX nodes and edges.
- Set up project file for the test project with necessary dependencies and configurations.
- Include JSON fixture files for testing purposes.

docs/implplan/SPRINT_120_policy_reasoning.md

@@ -9,8 +9,8 @@ AIRGAP-POL-56-001 | DONE | Implement `StellaOps.AirGap.Policy` package exposing
 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)
+AIRGAP-POL-58-001 | DONE (2025-11-03) | Ensure Observability exporters only target local endpoints in sealed mode; disable remote sinks with warning.<br>2025-11-03: Introduced `StellaOps.Telemetry.Core` with OTLP exporter guard; Registry Token Service consumes new telemetry bootstrap; sealed-mode now skips non-loopback collectors and logs remediation guidance; docs refreshed for telemetry/air-gap playbooks. Dependencies: AIRGAP-POL-57-002. | AirGap Policy Guild, Observability Guild (src/AirGap/StellaOps.AirGap.Policy/TASKS.md)
+AIRGAP-POL-58-002 | DONE (2025-11-03) | Add CLI sealed-mode guard that refuses commands needing egress and surfaces remediation.<br>2025-11-03: CLI now wires HTTP clients through `StellaOps.AirGap.Policy`, returns `AIRGAP_EGRESS_BLOCKED` with remediation when sealed, and docs updated. Dependencies: AIRGAP-POL-58-001. | AirGap Policy Guild, CLI Guild (src/AirGap/StellaOps.AirGap.Policy/TASKS.md)
 
 
 [Policy & Reasoning] 120.B) Findings.I
@@ -18,10 +18,10 @@ Depends on: Sprint 110.A - AdvisoryAI
 Summary: Policy & Reasoning focus on Findings (phase I).
 Task ID | State | Task description | Owners (Source)
 --- | --- | --- | ---
-LEDGER-29-001 | TODO | Design ledger & projection schemas (tables/indexes), canonical JSON format, hashing strategy, and migrations. Publish schema doc + fixtures. | Findings Ledger Guild (src/Findings/StellaOps.Findings.Ledger/TASKS.md)
-LEDGER-29-002 | TODO | Implement ledger write API (`POST /vuln/ledger/events`) with validation, idempotency, hash chaining, and Merkle root computation job. Dependencies: LEDGER-29-001. | Findings Ledger Guild (src/Findings/StellaOps.Findings.Ledger/TASKS.md)
-LEDGER-29-003 | TODO | Build projector worker that derives `findings_projection` rows from ledger events + policy determinations; ensure idempotent replay keyed by `(tenant,finding_id,policy_version)`. Dependencies: LEDGER-29-002. | Findings Ledger Guild, Scheduler Guild (src/Findings/StellaOps.Findings.Ledger/TASKS.md)
-LEDGER-29-004 | TODO | Integrate Policy Engine batch evaluation (baseline + simulate) with projector; cache rationale references. Dependencies: LEDGER-29-003. | Findings Ledger Guild, Policy Guild (src/Findings/StellaOps.Findings.Ledger/TASKS.md)
+LEDGER-29-001 | DONE (2025-11-03) | Design ledger & projection schemas (tables/indexes), canonical JSON format, hashing strategy, and migrations. Publish schema doc + fixtures.<br>2025-11-03: Initial migration, canonical fixtures, and schema doc alignment delivered (LEDGER-29-001). | Findings Ledger Guild (src/Findings/StellaOps.Findings.Ledger/TASKS.md)
+LEDGER-29-002 | DONE (2025-11-03) | Implement ledger write API (`POST /vuln/ledger/events`) with validation, idempotency, hash chaining, and Merkle root computation job.<br>2025-11-03: Web service + domain scaffolding landed with canonical hashing helpers, in-memory repository, Merkle scheduler stub, request/response contracts, and unit tests covering hashing & conflict flows. Dependencies: LEDGER-29-001. | Findings Ledger Guild (src/Findings/StellaOps.Findings.Ledger/TASKS.md)
+LEDGER-29-003 | DONE (2025-11-03) | Build projector worker that derives `findings_projection` rows from ledger events + policy determinations; ensure idempotent replay keyed by `(tenant,finding_id,policy_version)`. <br>2025-11-03: Postgres projection services landed with replay checkpoints, fixtures, and unit coverage (LEDGER-29-003). Dependencies: LEDGER-29-002. | Findings Ledger Guild, Scheduler Guild (src/Findings/StellaOps.Findings.Ledger/TASKS.md)
+LEDGER-29-004 | DOING (2025-11-03) | Integrate Policy Engine batch evaluation (baseline + simulate) with projector; cache rationale references.<br>2025-11-04: Reducer+worker now store `policy_rationale` via inline evaluation; Postgres schema/fixtures/tests updated, pending real Policy Engine client wiring. Dependencies: LEDGER-29-003. | Findings Ledger Guild, Policy Guild (src/Findings/StellaOps.Findings.Ledger/TASKS.md)
 LEDGER-29-005 | TODO | Implement workflow mutation handlers (assign, comment, accept-risk, target-fix, verify-fix, reopen) producing ledger events with validation and attachments metadata. Dependencies: LEDGER-29-004. | Findings Ledger Guild (src/Findings/StellaOps.Findings.Ledger/TASKS.md)
 LEDGER-29-006 | TODO | Integrate attachment encryption (KMS envelope), signed URL issuance, CSRF protection hooks for Console. Dependencies: LEDGER-29-005. | Findings Ledger Guild, Security Guild (src/Findings/StellaOps.Findings.Ledger/TASKS.md)
 LEDGER-29-007 | TODO | Instrument metrics (`ledger_write_latency`, `projection_lag_seconds`, `ledger_events_total`), structured logs, and Merkle anchoring alerts; publish dashboards. Dependencies: LEDGER-29-006. | Findings Ledger Guild, Observability Guild (src/Findings/StellaOps.Findings.Ledger/TASKS.md)