chore: ignore equivalent YieldValue mutation in Har::splitLogEntries

The mutation from 'yield $index => $cloned' to 'yield $cloned' is
equivalent because the entries array always has sequential 0-indexed
keys, which matches PHP's auto-generated keys when the key is omitted.

Author: claude

infection.json5

@@ -6,6 +6,13 @@
         ]
     },
     "mutators": {
-        "@default": true
+        "@default": true,
+        "YieldValue": {
+            "ignore": [
+                // Equivalent mutation: entries array always has sequential 0-indexed keys,
+                // so yield $index => $cloned is equivalent to yield $cloned (PHP auto-generates same keys)
+                "Deviantintegral\\Har\\Har::splitLogEntries"
+            ]
+        }
     }
 }