feat(settings): enable_automation gate; reject stale montzar quote jumps

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/Unit/QuotePricePlausibilityTest.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace Tests\Unit;
+
+use App\Services\ConfigService;
+use PHPUnit\Framework\TestCase;
+
+class QuotePricePlausibilityTest extends TestCase
+{
+    public function test_rejects_stale_montzar_jump_against_reference(): void
+    {
+        $config = new class extends ConfigService {
+            public function referenceQuotePrice(): float
+            {
+                return 223_260_000.0;
+            }
+        };
+
+        $this->assertFalse($config->isPlausibleQuotePrice(168_336_410.0));
+        $this->assertTrue($config->isPlausibleQuotePrice(222_010_000.0));
+        $this->assertTrue($config->isPlausibleQuotePrice(223_260_000.0));
+    }
+
+    public function test_accepts_any_positive_when_no_reference(): void
+    {
+        $config = new class extends ConfigService {
+            public function referenceQuotePrice(): float
+            {
+                return 0.0;
+            }
+        };
+
+        $this->assertTrue($config->isPlausibleQuotePrice(168_336_410.0));
+        $this->assertFalse($config->isPlausibleQuotePrice(0.0));
+    }
+}