feat(core): sync framework security hardening and accessibility improvements

- add util.Go with panic recovery for background goroutines
- add util.EscapeLike and explicit ESCAPE clause for SQL LIKE queries
- add DummyCheckPassword and subtle.ConstantTimeCompare against timing attacks
- enforce session ID rotation upon login/oauth callback to prevent session fixation
- add sliding window login failure rate limiting and oauth state rate limiting
- fix redis client capture race in pubsub listeners and wait on stop channel
- adjust global --primary to oklch(51.1% 0.262 276.966) for WCAG AA contrast
- fix semantic heading levels and missing aria-labels across UI components
- document security, concurrency, and a11y standards in AGENTS.md

internal/apps/admin/push/events.go

@@ -16,6 +16,7 @@ import (
 	"github.com/Rain-kl/Wavelet/internal/repository"
 	"github.com/Rain-kl/Wavelet/pkg/logger"
 	pkgpush "github.com/Rain-kl/Wavelet/pkg/push"
+	"github.com/Rain-kl/Wavelet/pkg/util"
 	"gorm.io/gorm"
 )
 
@@ -76,7 +77,7 @@ var DefaultTrigger = &EventTrigger{}
 //nolint:contextcheck
 func (t *EventTrigger) Trigger(ctx context.Context, meta EventMetadata, body map[string]any) {
 	asyncCtx := context.WithoutCancel(ctx)
-	go func() {
+	util.Go(func() {
 		if body == nil {
 			body = make(map[string]any)
 		}
@@ -100,7 +101,7 @@ func (t *EventTrigger) Trigger(ctx context.Context, meta EventMetadata, body map
 		flatBody := getFlatBody(body)
 		msg, _ := t.buildMessage(&event, meta, flatBody, body)
 		t.enqueuePushTasks(asyncCtx, meta, &event, msg, flatBody)
-	}()
+	})
 }
 
 func (t *EventTrigger) buildMessage(event *model.PushEvent, meta EventMetadata, flatBody map[string]any, body map[string]any) (NotificationMessage, string) {