fix(housekeeping): audit sensitive actions

Several privileged housekeeping handlers returned success without appending an audit entry, so the action log stayed incomplete even after the log table schema was fixed. Add audit writes for ban, mute, password reset, HC changes, trade lock, item grants, room ownership transfer, and hotel alerts, and cover the expected logging surface with a contract test.

Emulator/src/test/java/com/eu/habbo/messages/incoming/housekeeping/HousekeepingAuditCoverageContractTest.java

@@ -0,0 +1,33 @@
+package com.eu.habbo.messages.incoming.housekeeping;
+
+import org.junit.jupiter.api.Test;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class HousekeepingAuditCoverageContractTest {
+    private static final List<String> SENSITIVE_HANDLERS = List.of(
+            "HousekeepingBanUserEvent.java",
+            "HousekeepingMuteUserEvent.java",
+            "HousekeepingResetUserPasswordEvent.java",
+            "HousekeepingSetHcSubscriptionEvent.java",
+            "HousekeepingTradeLockUserEvent.java",
+            "HousekeepingGrantItemEvent.java",
+            "HousekeepingTransferRoomOwnershipEvent.java",
+            "HousekeepingSendHotelAlertEvent.java"
+    );
+
+    @Test
+    void sensitiveHousekeepingActionsWriteAuditEntries() throws Exception {
+        Path base = Path.of("src/main/java/com/eu/habbo/messages/incoming/housekeeping");
+
+        for (String handler : SENSITIVE_HANDLERS) {
+            String source = Files.readString(base.resolve(handler));
+            assertTrue(source.contains("HousekeepingAuditLog.log"),
+                    handler + " must append a housekeeping audit log entry after successful privileged actions");
+        }
+    }
+}