feat: import work hours from SaaS and exchange signed time sheet

src/Enum/WorkHoursSyncOutcome.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Enum;
+
+enum WorkHoursSyncOutcome: string
+{
+    /** Hours were fetched and written. */
+    case IMPORTED = 'imported';
+
+    /** The month is signed, so the hours were compared but left alone. */
+    case LOCKED = 'locked';
+
+    /** Nothing to do: no address on file, or nothing to import. */
+    case SKIPPED = 'skipped';
+
+    /** The request or the payload failed. Worth waking someone for. */
+    case FAILED = 'failed';
+}