🔒 Security: Remove hardcoded credentials and enforce environment variable validation#7

Copilot wants to merge 2 commits intomainblack-zero358/GradNote:mainfrom

copilot/fix-703c3f65-d2a8-4de1-8a67-7afcd806ab88black-zero358/GradNote:copilot/fix-703c3f65-d2a8-4de1-8a67-7afcd806ab88Copy head branch name to clipboard