Add config values for lock timeout and lock wait

config/rewind.php

@@ -93,4 +93,16 @@
     */
 
     'listener_should_queue' => env('LARAVEL_REWIND_LISTENER_SHOULD_QUEUE', false),
+
+    /*
+    |--------------------------------------------------------------------------
+    | Concurrency Settings
+    |--------------------------------------------------------------------------
+    |
+    | Define how long to wait (in seconds) for lock acquisition before timing out,
+    | and how long the lock should remain valid if the process unexpectedly ends.
+    */
+
+    'lock_wait' => env('REWIND_LOCK_WAIT', 10),
+    'lock_timeout' => env('REWIND_LOCK_TIMEOUT', 10),
 ];

src/Exceptions/CurrentVersionColumnMissingException.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace AvocetShores\LaravelRewind\Exceptions;
+
+class CurrentVersionColumnMissingException
+{
+
+}

src/Listeners/CreateRewindVersion.php

@@ -19,11 +19,11 @@ public function handle(RewindVersionCreating $event): void
 
         $lock = cache()->lock(
             sprintf('laravel-rewind-version-lock-%s-%s', $model->getTable(), $model->getKey()),
-            10
+            config('rewind.lock_timeout', 10)
         );
 
         try {
-            $lock->block(10);
+            $lock->block(config('rewind.lock_wait', 10));
 
             // Re-check that something is dirty (edge case: might be no changes after all)
             $dirty = $model->getDirty();