feat: Implement Scheduler Worker Options and Planner Loop

- Added `SchedulerWorkerOptions` class to encapsulate configuration for the scheduler worker.
- Introduced `PlannerBackgroundService` to manage the planner loop, fetching and processing planning runs.
- Created `PlannerExecutionService` to handle the execution logic for planning runs, including impact targeting and run persistence.
- Developed `PlannerExecutionResult` and `PlannerExecutionStatus` to standardize execution outcomes.
- Implemented validation logic within `SchedulerWorkerOptions` to ensure proper configuration.
- Added documentation for the planner loop and impact targeting features.
- Established health check endpoints and authentication mechanisms for the Signals service.
- Created unit tests for the Signals API to ensure proper functionality and response handling.
- Configured options for authority integration and fallback authentication methods.

docs/updates/2025-10-28-docs-guild.md

@@ -0,0 +1,26 @@
+# Docs Guild Update — 2025-10-28
+
+## Console security posture draft
+
+- Published `docs/security/console-security.md` covering console OIDC/DPoP flow, scope map, fresh-auth sequence, CSP defaults, evidence handling, and monitoring checklist.
+- Authority owners (`AUTH-CONSOLE-23-003`) to verify `/fresh-auth` token semantics (120 s OpTok, 300 s fresh-auth window) and confirm scope bundles before closing the sprint task.
+- Security Guild requested to execute the compliance checklist in §9 and record sign-off in SPRINT 23 log once alerts/dashboards are wired (metrics references: `ui_request_duration_seconds`, `ui_dpop_failure_total`, Grafana board `console-security.json`).
+
+## Console CLI parity matrix
+
+- Added `/docs/cli-vs-ui-parity.md` with feature-level status tracking (✅/🟡/🟩). Pending commands reference CLI backlog (`CLI-EXPORT-35-001`, `CLI-POLICY-23-005`, `CONSOLE-DOC-23-502`).
+- DevEx/CLI Guild to wire parity CI workflow when CLI downloads commands ship; Downloads workspace already links to the forthcoming parity report slot.
+
+## Accessibility refresh
+
+- Published `/docs/accessibility.md` describing keyboard flows, screen-reader behaviour, colour tokens, testing rig (Storybook axe, Playwright a11y), and offline guidance.
+- Accessibility Guild (CONSOLE-QA-23-402) to log the next Playwright a11y sweep results against the new checklist; design tokens follow-up tracked via CONSOLE-FEAT-23-102.
+
+Artifacts:
+
+- Doc: `/docs/security/console-security.md`
+- Doc: `/docs/cli-vs-ui-parity.md`
+- Doc: `/docs/accessibility.md`
+- Sprint tracker: `SPRINTS.md` (DOCS-CONSOLE-23-012 now DONE)
+
+cc: `@authority-core`, `@security-guild`, `@docs-guild`