feat: Add documentation and task tracking for Sprints 508 to 514 in Ops & Offline

- Created detailed markdown files for Sprints 508 (Ops Offline Kit), 509 (Samples), 510 (AirGap), 511 (Api), 512 (Bench), 513 (Provenance), and 514 (Sovereign Crypto Enablement) outlining tasks, dependencies, and owners.
- Introduced a comprehensive Reachability Evidence Delivery Guide to streamline the reachability signal process.
- Implemented unit tests for Advisory AI to block known injection patterns and redact secrets.
- Added AuthoritySenderConstraintHelper to manage sender constraints in OpenIddict transactions.

docs/implplan/SPRINT_126_policy_reasoning.md

@@ -0,0 +1,27 @@
+# Sprint 126 - Policy & Reasoning
+
+_Last updated: November 8, 2025. Implementation order is DOING → TODO → BLOCKED._
+
+Focus areas below were split out of the previous combined sprint; execute sections in order unless noted.
+
+## Policy.IV
+Dependency: Sprint 120.C - Policy.III (must land before this track).
+Focus: Policy & Reasoning focus on Policy (phase IV).
+
+| # | Task ID & handle | State | Key dependency / next step | Owners |
+| --- | --- | --- | --- | --- |
+| 1 | POLICY-ENGINE-40-003 | TODO | Provide API/SDK utilities for consumers (Web Scanner, Graph Explorer) to request policy decisions with source evidence summaries (top severity sources, conflict counts) (Deps: POLICY-ENGINE-40-002) | Policy Guild, Web Scanner Guild / src/Policy/StellaOps.Policy.Engine/TASKS.md |
+| 2 | POLICY-ENGINE-50-001 | TODO | Implement SPL compiler: validate YAML, canonicalize, produce signed bundle, store artifact in object storage, write `policy_revisions` with AOC metadata (Deps: POLICY-ENGINE-40-003) | Policy Guild, Platform Security / src/Policy/StellaOps.Policy.Engine/TASKS.md |
+| 3 | POLICY-ENGINE-50-002 | TODO | Build runtime evaluator executing compiled plans over advisory/vex linksets + SBOM asset metadata with deterministic caching (Redis) and fallback path (Deps: POLICY-ENGINE-50-001) | Policy Guild, Runtime Guild / src/Policy/StellaOps.Policy.Engine/TASKS.md |
+| 4 | POLICY-ENGINE-50-003 | TODO | Implement evaluation/compilation metrics, tracing, and structured logs (`policy_eval_seconds`, `policy_compiles_total`, explanation sampling) (Deps: POLICY-ENGINE-50-002) | Policy Guild, Observability Guild / src/Policy/StellaOps.Policy.Engine/TASKS.md |
+| 5 | POLICY-ENGINE-50-004 | TODO | Build event pipeline: subscribe to linkset/SBOM updates, schedule re-eval jobs, emit `policy.effective.updated` events with diff metadata (Deps: POLICY-ENGINE-50-003) | Policy Guild, Platform Events Guild / src/Policy/StellaOps.Policy.Engine/TASKS.md |
+| 6 | POLICY-ENGINE-50-005 | TODO | Design and implement `policy_packs`, `policy_revisions`, `policy_runs`, `policy_artifacts` collections with indexes, TTL, and tenant scoping (Deps: POLICY-ENGINE-50-004) | Policy Guild, Storage Guild / src/Policy/StellaOps.Policy.Engine/TASKS.md |
+| 7 | POLICY-ENGINE-50-006 | TODO | Implement explainer persistence + retrieval APIs linking decisions to explanation tree and AOC chain (Deps: POLICY-ENGINE-50-005) | Policy Guild, QA Guild / src/Policy/StellaOps.Policy.Engine/TASKS.md |
+| 8 | POLICY-ENGINE-50-007 | TODO | Provide evaluation worker host/DI wiring and job orchestration hooks for batch re-evaluations after policy activation (Deps: POLICY-ENGINE-50-006) | Policy Guild, Scheduler Worker Guild / src/Policy/StellaOps.Policy.Engine/TASKS.md |
+| 9 | POLICY-ENGINE-60-001 | TODO | Maintain Redis effective decision maps per asset/snapshot for Graph overlays; implement versioning and eviction strategy (Deps: POLICY-ENGINE-50-007) | Policy Guild, SBOM Service Guild / src/Policy/StellaOps.Policy.Engine/TASKS.md |
+| 10 | POLICY-ENGINE-60-002 | TODO | Expose simulation bridge for Graph What-if APIs, supporting hypothetical SBOM diffs and draft policies without persisting results (Deps: POLICY-ENGINE-60-001) | Policy Guild, BE-Base Platform Guild / src/Policy/StellaOps.Policy.Engine/TASKS.md |
+| 11 | POLICY-ENGINE-70-002 | TODO | Design and create Mongo collections (`exceptions`, `exception_reviews`, `exception_bindings`) with indexes and migrations; expose repository APIs (Deps: POLICY-ENGINE-60-002) | Policy Guild, Storage Guild / src/Policy/StellaOps.Policy.Engine/TASKS.md |
+| 12 | POLICY-ENGINE-70-003 | TODO | Build Redis exception decision cache (`exceptions_effective_map`) with warm/invalidation logic reacting to `exception.*` events (Deps: POLICY-ENGINE-70-002) | Policy Guild, Runtime Guild / src/Policy/StellaOps.Policy.Engine/TASKS.md |
+| 13 | POLICY-ENGINE-70-004 | TODO | Extend metrics/tracing/logging for exception application (latency, counts, expiring events) and include AOC references in logs (Deps: POLICY-ENGINE-70-003) | Policy Guild, Observability Guild / src/Policy/StellaOps.Policy.Engine/TASKS.md |
+| 14 | POLICY-ENGINE-70-005 | TODO | Provide APIs/workers hook for exception activation/expiry (auto start/end) and event emission (`exception.activated/expired`) (Deps: POLICY-ENGINE-70-004) | Policy Guild, Scheduler Worker Guild / src/Policy/StellaOps.Policy.Engine/TASKS.md |
+| 15 | POLICY-ENGINE-80-001 | TODO | Integrate reachability/exploitability inputs into evaluation pipeline (state/score/confidence) with caching and explain support (Deps: POLICY-ENGINE-70-005) | Policy Guild, Signals Guild / src/Policy/StellaOps.Policy.Engine/TASKS.md |