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>

server/database/database.go

@@ -12,7 +12,7 @@ import (
 	_ "github.com/lib/pq"
 	_ "modernc.org/sqlite"
 
-	"switchboard-core/config"
+	"armature/config"
 )
 
 // DB is the application-wide database connection pool.
@@ -80,7 +80,7 @@ func connectPostgres(dsn string) error {
 // connectSQLite opens a SQLite database with WAL mode enabled.
 func connectSQLite(dsn string) error {
 	if dsn == "" {
-		dsn = "switchboard.db"
+		dsn = "armature.db"
 	}
 
 	// Ensure parent directory exists for file-based DBs.