refactor(logging): replace gin-specific context handling with generic context-based request metadata utilities

- Introduced reusable utilities in `requestmeta` to manage endpoint and response status in request contexts.
- Refactored plugins and handlers to use context-based metadata, removing direct dependency on `gin`.
- Updated tests to validate new context utilities and replaced `gin`-based context handling.

Fixed: #3166

internal/logging/requestmeta.go

@@ -0,0 +1,62 @@
+package logging
+
+import (
+	"context"
+	"sync/atomic"
+)
+
+type endpointKey struct{}
+type responseStatusKey struct{}
+
+type responseStatusHolder struct {
+	status atomic.Int32
+}
+
+func WithEndpoint(ctx context.Context, endpoint string) context.Context {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	return context.WithValue(ctx, endpointKey{}, endpoint)
+}
+
+func GetEndpoint(ctx context.Context) string {
+	if ctx == nil {
+		return ""
+	}
+	if endpoint, ok := ctx.Value(endpointKey{}).(string); ok {
+		return endpoint
+	}
+	return ""
+}
+
+func WithResponseStatusHolder(ctx context.Context) context.Context {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	if holder, ok := ctx.Value(responseStatusKey{}).(*responseStatusHolder); ok && holder != nil {
+		return ctx
+	}
+	return context.WithValue(ctx, responseStatusKey{}, &responseStatusHolder{})
+}
+
+func SetResponseStatus(ctx context.Context, status int) {
+	if ctx == nil || status <= 0 {
+		return
+	}
+	holder, ok := ctx.Value(responseStatusKey{}).(*responseStatusHolder)
+	if !ok || holder == nil {
+		return
+	}
+	holder.status.Store(int32(status))
+}
+
+func GetResponseStatus(ctx context.Context) int {
+	if ctx == nil {
+		return 0
+	}
+	holder, ok := ctx.Value(responseStatusKey{}).(*responseStatusHolder)
+	if !ok || holder == nil {
+		return 0
+	}
+	return int(holder.status.Load())
+}