Backend, sync, infra, docs: ETag, API versioning, k8s, web scaffold, Android 16, domain stubs

- Backend: ShallowEtagHeaderFilter for /api/v1/*, API-VERSIONING.md, README (tenant, CORS, Flyway, ETag)
- k8s: backend-deployment.yaml (Deployment, Service, Secret/ConfigMap)
- Web: scaffold with directory pull, 304 handling, touch-friendly UI
- Android 16: ANDROID-16-TARGET.md; BuildConfig STUN/signaling, SMOAApplication configures InfrastructureManager
- Domain: CertificateManager revocation stub, ReportService signReports, ZeroTrust/ThreatDetection minimal docs
- TODO.md and IMPLEMENTATION_STATUS.md updated; communications README for endpoint config

Co-authored-by: Cursor <cursoragent@cursor.com>

NOTICE.md

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+# NOTICE
+
+## Canonical Sovereign System
+
+This repository implements **SMOA (Sovereign Management and Operational Authority)**, a Tier-1 canonical sovereign system as defined in the [Canonical Constitution](../../CANONICAL_CONSTITUTION.md).
+
+### Constitutional Status
+
+- **Tier**: Tier 1 – Sovereign Canon
+- **System**: SMOM/SMOA (Sovereign Management & Operations)
+- **Role**: Operational coordination, execution authority, and cross-system orchestration
+
+### Governance
+
+Changes to this repository are subject to formal proposal and recognition requirements as established in the Canonical Constitution. This system operates under mutual recognition with DBIS, ICCC, and GRU.
+
+SMOA does not supersede DBIS or ICCC but executes within their recognized frameworks.
+
+### Related Canonical Systems
+
+- **DBIS** (Distributed Body of International Sovereignty) – Foundational sovereign framework
+- **ICCC** (International Court of Canonical Continuity) – Adjudicative and interpretive body
+- **GRU** (Global Reserve Unit) – Monetary and settlement framework
+
+### Reference
+
+For the complete constitutional framework and governance principles, see: [CANONICAL_CONSTITUTION.md](../../CANONICAL_CONSTITUTION.md)
+
+---
+
+**Status**: Canonical
+**Last Updated**: 2025-01-27