feat(core): Add step-based progress tracking, task metadata and enhanced TaskManager scheduling/metadata APIs

ts/taskbuffer.interfaces.ts

@@ -0,0 +1,39 @@
+import type { ITaskStep } from './taskbuffer.classes.taskstep.js';
+
+export interface ITaskMetadata {
+  name: string;
+  version?: string;
+  status: 'idle' | 'running' | 'completed' | 'failed';
+  steps: ITaskStep[];
+  currentStep?: string;
+  currentProgress: number; // 0-100
+  lastRun?: Date;
+  nextRun?: Date; // For scheduled tasks
+  runCount: number;
+  averageDuration?: number;
+  cronSchedule?: string;
+  buffered?: boolean;
+  bufferMax?: number;
+  timeout?: number;
+}
+
+export interface ITaskExecutionReport {
+  taskName: string;
+  startTime: number;
+  endTime: number;
+  duration: number;
+  steps: ITaskStep[];
+  stepsCompleted: string[];
+  progress: number;
+  result?: any;
+  error?: Error;
+}
+
+export interface IScheduledTaskInfo {
+  name: string;
+  schedule: string;
+  nextRun: Date;
+  lastRun?: Date;
+  steps?: ITaskStep[];
+  metadata?: ITaskMetadata;
+}