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/index.ts

@@ -1,3 +1,4 @@
+import "dotenv/config";
 import express from "express";
 import cors from "cors";
 import { validateEnv } from "./config/env";