fix: treat generic AI detections as non-game in backfill

When AI fallback returns generic platform/engine terms (e.g. srcds,
source dedicated server, steamcmd), treat them as non-game detections
instead of logging them as unmapped games. Also prompt the model to
return null for generic terms.

Author: dgibbs64

.github/workflows/labeler.yml

@@ -1011,6 +1011,22 @@ jobs:
               return {};
             }
 
+            function isGenericNonGameDetection(value) {
+              const normalized = normalizeName(value);
+              if (!normalized) return false;
+
+              return [
+                'srcds',
+                'source dedicated server',
+                'dedicated server',
+                'source engine',
+                'goldsrc',
+                'steamcmd',
+                'linuxgsm',
+                'lgsm',
+              ].some((term) => normalized.includes(term));
+            }
+
             function hasAliasHitForLabel(text, targetLabel, gameAliasToLabel) {
               const normalizedText = normalizeName(text);
               if (!normalizedText || !targetLabel) return false;
@@ -1366,7 +1382,9 @@ jobs:
                     messages: [
                       {
                         role: 'system',
-                        content: 'Return JSON only. Identify the game referenced in this LinuxGSM issue with high precision.',
+                        content:
+                          'Return JSON only. Identify the specific game referenced in this LinuxGSM issue with high precision. ' +
+                          'If only generic platform/engine terms are present (e.g. srcds, source dedicated server, steamcmd), return detected_game as null.',
                       },
                       {
                         role: 'user',
@@ -1424,9 +1442,15 @@ jobs:
                             );
                           }
                         } else {
-                          console.log(
-                            `#${rawIssue.number}: AI fallback returned unmapped game "${parsed?.detected_game}"`
-                          );
+                          if (isGenericNonGameDetection(parsed?.detected_game || '')) {
+                            console.log(
+                              `#${rawIssue.number}: AI fallback skipped generic non-game detection "${parsed?.detected_game}"`
+                            );
+                          } else {
+                            console.log(
+                              `#${rawIssue.number}: AI fallback returned unmapped game "${parsed?.detected_game}"`
+                            );
+                          }
                         }
                       }
                     } else {