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>

README.md

@@ -1,11 +1,11 @@
-# Switchboard Core
+# Armature
 
 A self-hosted extension platform. Identity, teams, permissions, workflows,
 and a package system. Everything else ships as installable extensions.
 
 ## What This Is
 
-Switchboard Core is the kernel. It provides the primitives that extensions
+Armature is the kernel. It provides the primitives that extensions
 build on: users, teams, groups, scoped credentials, a Starlark sandbox,
 workflow orchestration, notifications, and a package installer. It does not
 include AI chat, providers, personas, or any domain-specific features —
@@ -27,7 +27,7 @@ docker compose up --build
 # → http://localhost:3000  (admin/admin)
 
 # Or from source
-git clone <repo-url> && cd switchboard-core
+git clone <repo-url> && cd armature
 cp server/.env.example server/.env  # edit DB credentials
 cd server && go run .
 # → http://localhost:8080