BREAKING CHANGE(taskbuffer): Introduce constraint-based concurrency with TaskConstraintGroup and TaskManager integration; remove legacy TaskRunner and several Task APIs (breaking); add typed Task.data and update exports and tests.

ts/taskbuffer.interfaces.ts

@@ -1,4 +1,18 @@
 import type { ITaskStep } from './taskbuffer.classes.taskstep.js';
+import type { Task } from './taskbuffer.classes.task.js';
+
+export interface ITaskConstraintGroupOptions<TData extends Record<string, unknown> = Record<string, unknown>> {
+  name: string;
+  constraintKeyForTask: (task: Task<any, any, TData>) => string | null | undefined;
+  maxConcurrent?: number;  // default: Infinity
+  cooldownMs?: number;     // default: 0
+}
+
+export interface IConstrainedTaskEntry {
+  task: Task<any, any, any>;
+  input: any;
+  deferred: import('@push.rocks/smartpromise').Deferred<any>;
+}
 
 export interface ITaskMetadata {
   name: string;