API allows update/set of budget limit notes. https://github.com/firefly-iii/firefly-iii/issues/5523

app/Models/BudgetLimit.php

@@ -31,6 +31,7 @@ use FireflyIII\Support\Models\ReturnsIntegerIdTrait;
 use Illuminate\Database\Eloquent\Casts\Attribute;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\MorphMany;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 /**
@@ -90,6 +91,14 @@ class BudgetLimit extends Model
         return $this->belongsTo(TransactionCurrency::class);
     }
 
+    /**
+     * Get all the notes.
+     */
+    public function notes(): MorphMany
+    {
+        return $this->morphMany(Note::class, 'noteable');
+    }
+
     /**
      * Get the amount
      */