[grade=pending] QA sprint: commit 103 at-risk files from multi-agent sprint work

Committed by Hermes autonomous QA sprint 2026-08-13.
These files were modified during the Aug 12 sprint but never committed.

dashcaddy-api/src/utilities/error-handler.js

@@ -34,7 +34,7 @@ function errorMiddleware(err, req, res, next) {
       userId: req.user?.id,
       body: req.body
     }
-  ).catch(e => console.error('Failed to write to error log:', e.message));
+  ).catch(e => process.stderr.write(`[error-handler] Failed to write to error log: ${e.message}\n`));
 
   // Determine if this is an operational error (AppError) or programming error
   const isOperational = err.isOperational || err instanceof AppError;
@@ -65,11 +65,7 @@ function errorMiddleware(err, req, res, next) {
 
   // For non-operational errors, log as fatal
   if (!isOperational) {
-    console.error('FATAL: Non-operational error detected', {
-      error: err.message,
-      stack: err.stack,
-      path: req.path
-    });
+    process.stderr.write(`[FATAL] Non-operational error detected: ${JSON.stringify({ error: err.message, stack: err.stack, path: req.path })}\n`);
   }
 }