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-entrypoint.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 # ============================================
-# Switchboard Core - Backend Launcher
+# Armature - Backend Launcher
 # ============================================
 # Runs as an nginx entrypoint.d hook.
 # Starts the Go backend in the background
@@ -20,15 +20,15 @@ else
         -exec sed -i "s|%%BASE_PATH%%||g" {} +
 fi
 
-echo "🔀 Starting Switchboard Core backend..."
+echo "🔀 Starting Armature backend..."
 
 # Kill any stale backend from a previous entrypoint run
-pkill -f /usr/local/bin/switchboard 2>/dev/null || true
+pkill -f /usr/local/bin/armature 2>/dev/null || true
 sleep 0.2
 
 # Launch Go backend in background (from /app so migrations are found)
 cd /app
-/usr/local/bin/switchboard &
+/usr/local/bin/armature &
 BACKEND_PID=$!
 
 # Wait for backend to be ready (max 60s)