Improve logging

[matekungl-byborg]

Fix for "Too Many Open File Descriptors" Issue

Changes

• Refactored request logging implementation: Replaced global requestLogger with per-request logger instances
  • Removed global requestLogger variable that was previously initialized once
  • Now creating a new logger instance for each request in expressRequestLogger function
  • This prevents file descriptor accumulation over time

Technical Details

• The previous implementation used a single shared logger instance for all requests
• The new implementation creates a fresh logger for each request, ensuring proper resource cleanup
• Request metadata is now directly included in the logger's defaultMeta rather than passed as a parameter
• All other logging functionality (S3, GCS, local storage) remains unchanged

Benefits

• Fixes the "Too many open file descriptors" error in high-traffic environments
• Maintains all existing logging capabilities while improving resource management
• No configuration changes required - works with all existing storage backends

Left is the original version, right is the fixed (simple lsof -w | wc -l)

[HenryHengZJ]

thnak you!