Add LDAP Distinguished Name Helper and Credential Audit Context

- Implemented LdapDistinguishedNameHelper for escaping RDN and filter values.
- Created AuthorityCredentialAuditContext and IAuthorityCredentialAuditContextAccessor for managing credential audit context.
- Developed StandardCredentialAuditLogger with tests for success, failure, and lockout events.
- Introduced AuthorityAuditSink for persisting audit records with structured logging.
- Added CryptoPro related classes for certificate resolution and signing operations.

docs/implplan/SPRINT_207_graph.md

@@ -7,14 +7,15 @@ Depends on: Sprint 120.A - AirGap, Sprint 130.A - Scanner, Sprint 150.A - Orches
 Summary: Experience & SDKs focus on Graph).
 Task ID | State | Task description | Owners (Source)
 --- | --- | --- | ---
-GRAPH-API-28-001 | TODO | Define OpenAPI + JSON schema for graph search/query/paths/diff/export endpoints, including cost metadata and streaming tile schema. | Graph API Guild (src/Graph/StellaOps.Graph.Api/TASKS.md)
-GRAPH-API-28-002 | TODO | Implement `/graph/search` with multi-type index lookup, prefix/exact match, RBAC enforcement, and result ranking + caching. Dependencies: GRAPH-API-28-001. | Graph API Guild (src/Graph/StellaOps.Graph.Api/TASKS.md)
-GRAPH-API-28-003 | TODO | Build query planner + cost estimator for `/graph/query`, stream tiles (nodes/edges/stats) progressively, enforce budgets, provide cursor tokens. Dependencies: GRAPH-API-28-002. | Graph API Guild (src/Graph/StellaOps.Graph.Api/TASKS.md)
-GRAPH-API-28-004 | TODO | Implement `/graph/paths` with depth ≤6, constraint filters, heuristic shortest path search, and optional policy overlay rendering. Dependencies: GRAPH-API-28-003. | Graph API Guild (src/Graph/StellaOps.Graph.Api/TASKS.md)
-GRAPH-API-28-005 | TODO | Implement `/graph/diff` streaming added/removed/changed nodes/edges between SBOM snapshots; include overlay deltas and policy/VEX/advisory metadata. Dependencies: GRAPH-API-28-004. | Graph API Guild (src/Graph/StellaOps.Graph.Api/TASKS.md)
-GRAPH-API-28-006 | TODO | Consume Policy Engine overlay contract (`POLICY-ENGINE-30-001..003`) and surface advisory/VEX/policy overlays with caching, partial materialization, and explain trace sampling for focused nodes. Dependencies: GRAPH-API-28-005. | Graph API Guild (src/Graph/StellaOps.Graph.Api/TASKS.md)
-GRAPH-API-28-007 | TODO | Implement exports (`graphml`, `csv`, `ndjson`, `png`, `svg`) with async job management, checksum manifests, and streaming downloads. Dependencies: GRAPH-API-28-006. | Graph API Guild (src/Graph/StellaOps.Graph.Api/TASKS.md)
-GRAPH-API-28-008 | TODO | Integrate RBAC scopes (`graph:read`, `graph:query`, `graph:export`), tenant headers, audit logging, and rate limiting. Dependencies: GRAPH-API-28-007. | Graph API Guild, Authority Guild (src/Graph/StellaOps.Graph.Api/TASKS.md)
-GRAPH-API-28-009 | TODO | Instrument metrics (`graph_tile_latency_seconds`, `graph_query_budget_denied_total`, `graph_overlay_cache_hit_ratio`), structured logs, and traces per query stage; publish dashboards. Dependencies: GRAPH-API-28-008. | Graph API Guild, Observability Guild (src/Graph/StellaOps.Graph.Api/TASKS.md)
-GRAPH-API-28-010 | TODO | Build unit/integration/load tests with synthetic datasets (500k nodes/2M edges), fuzz query validation, verify determinism across runs. Dependencies: GRAPH-API-28-009. | Graph API Guild, QA Guild (src/Graph/StellaOps.Graph.Api/TASKS.md)
-GRAPH-API-28-011 | TODO | Provide deployment manifests, offline kit support, API gateway integration docs, and smoke tests. Dependencies: GRAPH-API-28-010. | Graph API Guild, DevOps Guild (src/Graph/StellaOps.Graph.Api/TASKS.md)
+GRAPH-API-28-001 | TODO | Define OpenAPI + JSON schema for graph search/query/paths/diff/export endpoints, including cost metadata and streaming tile schema. | Graph API Guild (src/Graph/StellaOps.Graph.Api)
+GRAPH-API-28-002 | TODO | Implement `/graph/search` with multi-type index lookup, prefix/exact match, RBAC enforcement, and result ranking + caching. Dependencies: GRAPH-API-28-001. | Graph API Guild (src/Graph/StellaOps.Graph.Api)
+GRAPH-API-28-003 | TODO | Build query planner + cost estimator for `/graph/query`, stream tiles (nodes/edges/stats) progressively, enforce budgets, provide cursor tokens. Dependencies: GRAPH-API-28-002. | Graph API Guild (src/Graph/StellaOps.Graph.Api)
+GRAPH-API-28-004 | TODO | Implement `/graph/paths` with depth ≤6, constraint filters, heuristic shortest path search, and optional policy overlay rendering. Dependencies: GRAPH-API-28-003. | Graph API Guild (src/Graph/StellaOps.Graph.Api)
+GRAPH-API-28-005 | TODO | Implement `/graph/diff` streaming added/removed/changed nodes/edges between SBOM snapshots; include overlay deltas and policy/VEX/advisory metadata. Dependencies: GRAPH-API-28-004. | Graph API Guild (src/Graph/StellaOps.Graph.Api)
+GRAPH-API-28-006 | TODO | Consume Policy Engine overlay contract (`POLICY-ENGINE-30-001..003`) and surface advisory/VEX/policy overlays with caching, partial materialization, and explain trace sampling for focused nodes. Dependencies: GRAPH-API-28-005. | Graph API Guild (src/Graph/StellaOps.Graph.Api)
+GRAPH-API-28-007 | TODO | Implement exports (`graphml`, `csv`, `ndjson`, `png`, `svg`) with async job management, checksum manifests, and streaming downloads. Dependencies: GRAPH-API-28-006. | Graph API Guild (src/Graph/StellaOps.Graph.Api)
+GRAPH-API-28-008 | TODO | Integrate RBAC scopes (`graph:read`, `graph:query`, `graph:export`), tenant headers, audit logging, and rate limiting. Dependencies: GRAPH-API-28-007. | Graph API Guild, Authority Guild (src/Graph/StellaOps.Graph.Api)
+GRAPH-API-28-009 | TODO | Instrument metrics (`graph_tile_latency_seconds`, `graph_query_budget_denied_total`, `graph_overlay_cache_hit_ratio`), structured logs, and traces per query stage; publish dashboards. Dependencies: GRAPH-API-28-008. | Graph API Guild, Observability Guild (src/Graph/StellaOps.Graph.Api)
+GRAPH-API-28-010 | TODO | Build unit/integration/load tests with synthetic datasets (500k nodes/2M edges), fuzz query validation, verify determinism across runs. Dependencies: GRAPH-API-28-009. | Graph API Guild, QA Guild (src/Graph/StellaOps.Graph.Api)
+GRAPH-API-28-011 | TODO | Provide deployment manifests, offline kit support, API gateway integration docs, and smoke tests. Dependencies: GRAPH-API-28-010. | Graph API Guild, DevOps Guild (src/Graph/StellaOps.Graph.Api)
+GRAPH-INDEX-28-011 | DONE (2025-11-04) | Wire SBOM ingest runtime to emit graph snapshot artifacts, add DI factory helpers, and document Mongo/snapshot environment guidance. Dependencies: GRAPH-INDEX-28-002..006. | Graph Indexer Guild (src/Graph/StellaOps.Graph.Indexer)