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-e2e.yml

@@ -1,6 +1,6 @@
 # docker-compose-e2e.yml — Multi-replica E2E testing (Postgres)
 #
-# Three Switchboard replicas behind an nginx load balancer,
+# Three Armature replicas behind an nginx load balancer,
 # sharing a single Postgres instance. Tests cross-replica
 # broadcast via pg_notify and cluster registry (v0.6.0).
 #
@@ -14,18 +14,18 @@ services:
   postgres:
     image: postgres:16-alpine
     environment:
-      POSTGRES_DB: switchboard_e2e
-      POSTGRES_USER: switchboard
+      POSTGRES_DB: armature_e2e
+      POSTGRES_USER: armature
       POSTGRES_PASSWORD: e2e-password
     ports:
       - "5432:5432"
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U switchboard -d switchboard_e2e"]
+      test: ["CMD-SHELL", "pg_isready -U armature -d armature_e2e"]
       interval: 2s
       timeout: 5s
       retries: 10
 
-  switchboard-1:
+  armature-1:
     build:
       context: .
       dockerfile: Dockerfile
@@ -33,11 +33,11 @@ services:
       PORT: "8080"
       BASE_PATH: ""
       DB_DRIVER: postgres
-      DATABASE_URL: postgres://switchboard:e2e-password@postgres:5432/switchboard_e2e?sslmode=disable
+      DATABASE_URL: postgres://armature:e2e-password@postgres:5432/armature_e2e?sslmode=disable
       JWT_SECRET: e2e-jwt-secret
       ENCRYPTION_KEY: e2e-encryption-key-32chars!!!!!
-      SWITCHBOARD_ADMIN_USERNAME: admin
-      SWITCHBOARD_ADMIN_PASSWORD: admin
+      ARMATURE_ADMIN_USERNAME: admin
+      ARMATURE_ADMIN_PASSWORD: admin
       STORAGE_BACKEND: pvc
       STORAGE_PATH: /data/storage
       CORS_ALLOWED_ORIGINS: "*"
@@ -48,14 +48,14 @@ services:
       CLUSTER_NODE_ID: "node-1"
       CLUSTER_HEARTBEAT_INTERVAL: "5s"
       CLUSTER_STALE_THRESHOLD: "15s"
-      CLUSTER_ENDPOINT: "http://switchboard-1:8080"
+      CLUSTER_ENDPOINT: "http://armature-1:8080"
     depends_on:
       postgres:
         condition: service_healthy
     ports:
       - "8081:80"
 
-  switchboard-2:
+  armature-2:
     build:
       context: .
       dockerfile: Dockerfile
@@ -63,11 +63,11 @@ services:
       PORT: "8080"
       BASE_PATH: ""
       DB_DRIVER: postgres
-      DATABASE_URL: postgres://switchboard:e2e-password@postgres:5432/switchboard_e2e?sslmode=disable
+      DATABASE_URL: postgres://armature:e2e-password@postgres:5432/armature_e2e?sslmode=disable
       JWT_SECRET: e2e-jwt-secret
       ENCRYPTION_KEY: e2e-encryption-key-32chars!!!!!
-      SWITCHBOARD_ADMIN_USERNAME: admin
-      SWITCHBOARD_ADMIN_PASSWORD: admin
+      ARMATURE_ADMIN_USERNAME: admin
+      ARMATURE_ADMIN_PASSWORD: admin
       STORAGE_BACKEND: pvc
       STORAGE_PATH: /data/storage
       CORS_ALLOWED_ORIGINS: "*"
@@ -78,14 +78,14 @@ services:
       CLUSTER_NODE_ID: "node-2"
       CLUSTER_HEARTBEAT_INTERVAL: "5s"
       CLUSTER_STALE_THRESHOLD: "15s"
-      CLUSTER_ENDPOINT: "http://switchboard-2:8080"
+      CLUSTER_ENDPOINT: "http://armature-2:8080"
     depends_on:
       postgres:
         condition: service_healthy
     ports:
       - "8082:80"
 
-  switchboard-3:
+  armature-3:
     build:
       context: .
       dockerfile: Dockerfile
@@ -93,11 +93,11 @@ services:
       PORT: "8080"
       BASE_PATH: ""
       DB_DRIVER: postgres
-      DATABASE_URL: postgres://switchboard:e2e-password@postgres:5432/switchboard_e2e?sslmode=disable
+      DATABASE_URL: postgres://armature:e2e-password@postgres:5432/armature_e2e?sslmode=disable
       JWT_SECRET: e2e-jwt-secret
       ENCRYPTION_KEY: e2e-encryption-key-32chars!!!!!
-      SWITCHBOARD_ADMIN_USERNAME: admin
-      SWITCHBOARD_ADMIN_PASSWORD: admin
+      ARMATURE_ADMIN_USERNAME: admin
+      ARMATURE_ADMIN_PASSWORD: admin
       STORAGE_BACKEND: pvc
       STORAGE_PATH: /data/storage
       CORS_ALLOWED_ORIGINS: "*"
@@ -108,7 +108,7 @@ services:
       CLUSTER_NODE_ID: "node-3"
       CLUSTER_HEARTBEAT_INTERVAL: "5s"
       CLUSTER_STALE_THRESHOLD: "15s"
-      CLUSTER_ENDPOINT: "http://switchboard-3:8080"
+      CLUSTER_ENDPOINT: "http://armature-3:8080"
     depends_on:
       postgres:
         condition: service_healthy
@@ -122,6 +122,6 @@ services:
     ports:
       - "3000:80"
     depends_on:
-      - switchboard-1
-      - switchboard-2
-      - switchboard-3
+      - armature-1
+      - armature-2
+      - armature-3