Use ngx_log_error! macro and fix formatting

- Switched from ngx_log_error_core() to ngx_log_error! macro
- Changed error_log level from debug to info (cleaner output)
- Formatting cleanup across all modules (cargo fmt)
- Removed trailing newlines and fixed indentation

Logging now properly uses nginx's macro system for better
integration with nginx's log handling.

conf/sqlite_serve.conf

@@ -8,7 +8,7 @@ events {
     worker_connections 1024;
 }
 
-error_log logs/error.log debug;
+error_log logs/error.log info;
 
 http {
     # Global templates for shared components