feat: add entropy policy banner and policy gate indicator components

- Implemented EntropyPolicyBannerComponent with configuration for entropy policies, including thresholds, current scores, and mitigation steps.
- Created PolicyGateIndicatorComponent to display the status of policy gates, including passed, failed, and warning gates, with detailed views for determinism and entropy gates.
- Added HTML and SCSS for both components to ensure proper styling and layout.
- Introduced computed properties and signals for reactive state management in Angular.
- Included remediation hints and actions for user interaction within the policy gate indicator.

docs/implplan/SPRINT_172_notifier_ii.md

@@ -7,17 +7,17 @@ Depends on: Sprint 170.A - Notifier.I
 Summary: Notifications & Telemetry focus on Notifier (phase II).
 Task ID | State | Task description | Owners (Source)
 --- | --- | --- | ---
-NOTIFY-SVC-37-001 | TODO | Define pack approval & policy notification contract, including OpenAPI schema, event payloads, resume token mechanics, and security guidance. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
-NOTIFY-SVC-37-002 | TODO | Implement secure ingestion endpoint, Mongo persistence (`pack_approvals`), idempotent writes, and audit trail for approval events. Dependencies: NOTIFY-SVC-37-001. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
-NOTIFY-SVC-37-003 | TODO | Deliver approval/policy templates, routing predicates, and channel dispatch (email + webhook) with localization + redaction. Dependencies: NOTIFY-SVC-37-002. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
-NOTIFY-SVC-37-004 | TODO | Provide acknowledgement API, Task Runner callback client, metrics for outstanding approvals, and runbook updates. Dependencies: NOTIFY-SVC-37-003. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
-NOTIFY-SVC-38-002 | TODO | Implement channel adapters (email, chat webhook, generic webhook) with retry policies, health checks, and audit logging. Dependencies: NOTIFY-SVC-37-004. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
-NOTIFY-SVC-38-003 | TODO | Deliver template service (versioned templates, localization scaffolding) and renderer with redaction allowlists, Markdown/HTML/JSON outputs, and provenance links. Dependencies: NOTIFY-SVC-38-002. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
-NOTIFY-SVC-38-004 | TODO | Expose REST + WS APIs (rules CRUD, templates preview, incidents list, ack) with audit logging, RBAC checks, and live feed stream. Dependencies: NOTIFY-SVC-38-003. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
-NOTIFY-SVC-39-001 | TODO | Implement correlation engine with pluggable key expressions/windows, throttler (token buckets), quiet hours/maintenance evaluator, and incident lifecycle. Dependencies: NOTIFY-SVC-38-004. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
-NOTIFY-SVC-39-002 | TODO | Build digest generator (queries, formatting) with schedule runner and distribution via existing channels. Dependencies: NOTIFY-SVC-39-001. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
-NOTIFY-SVC-39-003 | TODO | Provide simulation engine/API to dry-run rules against historical events, returning matched actions with explanations. Dependencies: NOTIFY-SVC-39-002. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
-NOTIFY-SVC-39-004 | TODO | Integrate quiet hour calendars and default throttles with audit logging and operator overrides. Dependencies: NOTIFY-SVC-39-003. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
+NOTIFY-SVC-37-001 | DONE (2025-11-27) | Define pack approval & policy notification contract, including OpenAPI schema, event payloads, resume token mechanics, and security guidance. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
+NOTIFY-SVC-37-002 | DONE (2025-11-27) | Implement secure ingestion endpoint, Mongo persistence (`pack_approvals`), idempotent writes, and audit trail for approval events. Dependencies: NOTIFY-SVC-37-001. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
+NOTIFY-SVC-37-003 | DONE (2025-11-27) | Deliver approval/policy templates, routing predicates, and channel dispatch (email + webhook) with localization + redaction. Dependencies: NOTIFY-SVC-37-002. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
+NOTIFY-SVC-37-004 | DONE (2025-11-27) | Provide acknowledgement API, Task Runner callback client, metrics for outstanding approvals, and runbook updates. Dependencies: NOTIFY-SVC-37-003. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
+NOTIFY-SVC-38-002 | DONE (2025-11-27) | Implement channel adapters (email, chat webhook, generic webhook) with retry policies, health checks, and audit logging. Dependencies: NOTIFY-SVC-37-004. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
+NOTIFY-SVC-38-003 | DONE (2025-11-27) | Deliver template service (versioned templates, localization scaffolding) and renderer with redaction allowlists, Markdown/HTML/JSON outputs, and provenance links. Dependencies: NOTIFY-SVC-38-002. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
+NOTIFY-SVC-38-004 | DONE (2025-11-27) | Expose REST + WS APIs (rules CRUD, templates preview, incidents list, ack) with audit logging, RBAC checks, and live feed stream. Dependencies: NOTIFY-SVC-38-003. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
+NOTIFY-SVC-39-001 | DONE (2025-11-27) | Implement correlation engine with pluggable key expressions/windows, throttler (token buckets), quiet hours/maintenance evaluator, and incident lifecycle. Dependencies: NOTIFY-SVC-38-004. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
+NOTIFY-SVC-39-002 | DONE (2025-11-27) | Build digest generator (queries, formatting) with schedule runner and distribution via existing channels. Dependencies: NOTIFY-SVC-39-001. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
+NOTIFY-SVC-39-003 | DONE (2025-11-27) | Provide simulation engine/API to dry-run rules against historical events, returning matched actions with explanations. Dependencies: NOTIFY-SVC-39-002. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
+NOTIFY-SVC-39-004 | DONE (2025-11-27) | Integrate quiet hour calendars and default throttles with audit logging and operator overrides. Dependencies: NOTIFY-SVC-39-003. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
 NOTIFY-SVC-40-001 | DONE (2025-11-27) | Implement escalations + on-call schedules, ack bridge, PagerDuty/OpsGenie adapters, and CLI/in-app inbox channels. Dependencies: NOTIFY-SVC-39-004. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
 NOTIFY-SVC-40-002 | DONE (2025-11-27) | Add summary storm breaker notifications, localization bundles, and localization fallback handling. Dependencies: NOTIFY-SVC-40-001. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)
 NOTIFY-SVC-40-003 | SKIPPED | Harden security: signed ack links (KMS), webhook HMAC/IP allowlists, tenant isolation fuzz tests, HTML sanitization. Dependencies: NOTIFY-SVC-40-002. | Notifications Service Guild (src/Notifier/StellaOps.Notifier)