fix(api): sync task lifecycle state and restore GET /api/v1/tasks (#216)

* fix(api): update task route to handle GET and POST methods

Signed-off-by: Ilham Syahid S <ilhamsyahids@gmail.com>

* fix(api): implement ExecutableWrapper to manage task execution and status updates

Signed-off-by: Ilham Syahid S <ilhamsyahids@gmail.com>

* fix(api): refactor task registration and enqueueing into a separate method

Signed-off-by: Ilham Syahid S <ilhamsyahids@gmail.com>

---------

Signed-off-by: Ilham Syahid S <ilhamsyahids@gmail.com>

api/wrapper.go

@@ -0,0 +1,58 @@
+package api
+
+import (
+	"context"
+	"errors"
+
+	"github.com/krau/SaveAny-Bot/core"
+	"github.com/krau/SaveAny-Bot/pkg/enums/tasktype"
+)
+
+// ExecutableWrapper wraps core.Executable to track task status in the API store and send webhooks.
+type ExecutableWrapper struct {
+	inner core.Executable
+}
+
+func NewExecutableWrapper(inner core.Executable) *ExecutableWrapper {
+	return &ExecutableWrapper{inner: inner}
+}
+
+func (w *ExecutableWrapper) Type() tasktype.TaskType { return w.inner.Type() }
+func (w *ExecutableWrapper) Title() string           { return w.inner.Title() }
+func (w *ExecutableWrapper) TaskID() string          { return w.inner.TaskID() }
+
+func (w *ExecutableWrapper) Execute(ctx context.Context) error {
+	taskID := w.inner.TaskID()
+
+	if info, ok := GetTask(taskID); ok {
+		info.UpdateStatus(TaskStatusRunning)
+	}
+
+	err := w.inner.Execute(ctx)
+
+	info, ok := GetTask(taskID)
+	if !ok {
+		return err
+	}
+
+	var status TaskStatus
+	if err != nil {
+		if errors.Is(err, context.Canceled) {
+			status = TaskStatusCancelled
+			info.UpdateStatus(TaskStatusCancelled)
+		} else {
+			status = TaskStatusFailed
+			info.SetError(err.Error())
+		}
+	} else {
+		status = TaskStatusCompleted
+		info.UpdateStatus(TaskStatusCompleted)
+	}
+
+	if info.Webhook != "" {
+		payload := CreateWebhookPayload(taskID, info.Type, status, info.Storage, info.Path, err)
+		SendWebhook(ctx, payload)
+	}
+
+	return err
+}