docs: Enhance development setup documentation and update environment variable validation

- Added a new section in CURRENT_STATUS.md detailing prerequisites and quick start instructions for development setup.
- Updated environment variable validation to include defaults for missing variables in env.ts.
- Improved error handling in errorHandler.ts for better validation feedback.
- Made various code adjustments across services to ensure robustness and clarity.

orchestrator/src/api/execution.ts

@@ -1,6 +1,6 @@
 import { Request, Response } from "express";
 import { executionCoordinator } from "../services/execution";
-import { asyncHandler } from "../services/errorHandler";
+import { asyncHandler, AppError, ErrorType } from "../services/errorHandler";
 import { auditLog } from "../middleware";
 
 /**

orchestrator/src/api/webhooks.ts

@@ -1,6 +1,7 @@
 import { Request, Response } from "express";
 import { executionCoordinator } from "../services/execution";
 import { logger } from "../logging/logger";
+import { asyncHandler, AppError, ErrorType } from "../services/errorHandler";
 
 interface WebhookConfig {
   url: string;