feat(dashboard): resolve eg_backend_<id> → friendly name in HAProxy card

The HAProxy stats card now shows the configured backend name (e.g.
"My Backend/web1") instead of the internal HAProxy name
("eg_backend_1/web1"). Also surfaces the socket error message when
HAProxy is unreachable (⚠ HAProxy socket: <error>) instead of the
generic "no backends" empty state — operators immediately see whether
the box is unconfigured or the socket is down. v1.1.114.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cmd/edgeguard-api/main.go

@@ -60,7 +60,7 @@ import (
 	usersvc "git.netcell-it.de/projekte/edgeguard-native/internal/services/users"
 )
 
-var version = "1.1.113"
+var version = "1.1.114"
 
 func main() {
 	addr := os.Getenv("EDGEGUARD_API_ADDR")

cmd/edgeguard-ctl/main.go

@@ -11,7 +11,7 @@ import (
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/setup"
 )
 
-var version = "1.1.113"
+var version = "1.1.114"
 
 const usage = `edgeguard-ctl — EdgeGuard CLI
 

cmd/edgeguard-scheduler/main.go

@@ -41,7 +41,7 @@ import (
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/tlscerts"
 )
 
-var version = "1.1.113"
+var version = "1.1.114"
 
 const (
 	// renewTickInterval — how often we re-evaluate expiring certs.