refactor: migrate role handling from tiers to roles module

- Removed the deprecated tiers.ts file and migrated all related functionality to roles/index.js.
- Updated tests and tools to reflect the new role structure, replacing references to "dev", "qa", and "architect" with "developer", "tester", and "architect".
- Adjusted workflow configurations and state management to accommodate the new role naming conventions.
- Enhanced project registration and health check tools to support dynamic role handling.
- Updated task creation, update, and completion processes to align with the new role definitions.
- Improved documentation and comments to clarify role responsibilities and usage.

lib/tools/task-create.ts

@@ -13,7 +13,8 @@ import type { OpenClawPluginApi } from "openclaw/plugin-sdk";
 import { jsonResult } from "openclaw/plugin-sdk";
 import type { ToolContext } from "../types.js";
 import { log as auditLog } from "../audit.js";
-import { STATE_LABELS, type StateLabel } from "../providers/provider.js";
+import type { StateLabel } from "../providers/provider.js";
+import { DEFAULT_WORKFLOW, getStateLabels } from "../workflow.js";
 import { requireWorkspaceDir, resolveProject, resolveProvider } from "../tool-helpers.js";
 
 export function createTaskCreateTool(api: OpenClawPluginApi) {
@@ -46,7 +47,7 @@ Examples:
         label: {
           type: "string",
           description: `State label. Defaults to "Planning" — only use "To Do" when the user explicitly asks to start work immediately.`,
-          enum: STATE_LABELS,
+          enum: getStateLabels(DEFAULT_WORKFLOW),
         },
         assignees: {
           type: "array",