rebrand: Switchboard Core → Armature

- Rename Go module switchboard-core → armature (155+ files)
- Rename Docker image → gobha/armature
- Rename K8s resources, secrets, deployments
- Rename Prometheus metrics switchboard_* → armature_*
- Rename env vars SWITCHBOARD_ADMIN_* → ARMATURE_ADMIN_*
- Rename DB names switchboard_core* → armature*
- Update all frontend branding, notification templates, docs
- Update CI scripts, e2e tests, Keycloak realm, nginx conf
- Rename scripts/switchboard-ca.sh → scripts/armature-ca.sh
- Rename k8s/switchboard.yaml → k8s/armature.yaml
- Rename chart alerting/dashboard files
- Fix: DockerHub push uses env: binding for secret injection
- Helm chart updated (name, labels, template functions, dashboard, alerting)
- Replace favicon/icon assets with Armature brand

No functional changes. Pure mechanical rename + CI fix.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.yml

@@ -13,20 +13,20 @@
 # For Postgres / multi-replica / k8s deployment see k8s/ and Dockerfile.
 
 services:
-  switchboard:
+  armature:
     build:
       context: .
       dockerfile: Dockerfile
-    container_name: switchboard-core
+    container_name: armature
     environment:
       PORT: "8080"
       BASE_PATH: ""
       DB_DRIVER: sqlite
-      DATABASE_URL: /data/switchboard.db
+      DATABASE_URL: /data/armature.db
       JWT_SECRET: ${JWT_SECRET:-change-me-for-production}
       ENCRYPTION_KEY: ${ENCRYPTION_KEY:-change-me-for-production}
-      SWITCHBOARD_ADMIN_USERNAME: ${ADMIN_USERNAME:-admin}
-      SWITCHBOARD_ADMIN_PASSWORD: ${ADMIN_PASSWORD:-admin}
+      ARMATURE_ADMIN_USERNAME: ${ADMIN_USERNAME:-admin}
+      ARMATURE_ADMIN_PASSWORD: ${ADMIN_PASSWORD:-admin}
       STORAGE_BACKEND: pvc
       STORAGE_PATH: /data/storage
       CORS_ALLOWED_ORIGINS: ${CORS_ALLOWED_ORIGINS:-http://localhost:3000}