Fix production failures by updating user agents and adding retry mechanism

[RisHexx]

Problem

Library worked locally but failed in production VMs due to YouTube's anti-bot measures blocking requests with outdated user agents and incomplete headers.

Summary

• Updates outdated user agent strings (Chrome 85 → Chrome 120)
• Adds comprehensive browser headers for better request fingerprinting
• Implements retry mechanism with exponential backoff for rate limiting
• Updates InnerTube API client version to avoid detection

Solution

• User Agent: Updated from 2020 Chrome 85 to current Chrome 120
• Headers: Added proper Accept, Sec-Ch-*, Origin, Referer headers to mimic real browsers
• Retry Logic: Auto-retry failed requests (3x max) with exponential backoff
• API Version: Updated InnerTube client version for better compatibility

Impact

Resolves production blocking issues while maintaining full backward compatibility.

[RisHexx]

#38