fix: combine modelName + modelNumber for specs search query

Model numbers from OCR often have character errors (G→6, O→0 etc).
Using both fields together lets the human-readable name anchor the
search even when the model number is slightly wrong.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/Infrastructure/Messenger/Handler/SpecsResearchHandler.php

@@ -39,7 +39,10 @@ final class SpecsResearchHandler
             return;
         }
 
-        $searchSubject = $message->modelNumber !== '' ? $message->modelNumber : $message->modelName;
+        // Combine name + number so the human-readable name anchors the search
+        // even when the OCR'd model number contains character errors (e.g. G→6).
+        $parts = array_filter([$message->modelName, $message->modelNumber]);
+        $searchSubject = implode(' ', $parts);
 
         try {
             $specsText = $this->specsAgent->research(