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>

packages/dashboard/js/main.js

@@ -1,5 +1,5 @@
 // ==========================================
-// Switchboard Core — Dashboard Package (v0.31.1)
+// Armature — Dashboard Package (v0.31.1)
 // ==========================================
 // SDK Exercise Surface. Exercises every sw.* primitive with ZERO
 // component CSS overrides. All styling comes from the SDK itself.

packages/dashboard/manifest.json

@@ -4,7 +4,7 @@
   "type": "full",
   "version": "0.31.1",
   "tier": "browser",
-  "author": "Switchboard Core",
+  "author": "Armature",
   "icon": "📊",
   "description": "Project dashboard exercising all SDK primitives (requires legacy sw.* SDK — dormant until rewritten)",
   "requires": ["legacy-sdk"],