refactor: harden index entrypoint initialization and isolate logging …

[Darshan-paapani06]

🚀 Purpose

Hardens the main application entry point bootstrap logic, optimizes performance metric environments, and upgrades PWA worker error handling pathways.

🛠️ Changes Made

• Container Dom Defensiveness: Implemented strict validation on the root DOM container retrieval target to catch runtime mounting bugs early.
• Isolated Metric Streaming: Configured reportWebVitals analytics pipes to cleanly segregate local terminal debugging from production telemetry scopes.
• PWA Warning Standardization: Elevated hidden script failures (console.warn) inside the Service Worker catch pipeline into explicit error exceptions to ease remote diagnostic logging tracking.
• Environment Context Storage: Abstracted production flag assignments to static local evaluations for faster code block condition checks.

🧪 Verification Done

• Checked browser logs locally; confirmed Web Vitals trace messages only output while in local development profiles.
• Verified DOM rendering cascades through the ThemeProvider and ElementProvider components cleanly.