test: centralise SlowDown setter teardown to prevent static state leakage

Move per-test S3::set* restore calls into a single tearDown() so that
state is always reset even if a test aborts mid-assertion.

Author: ChiragAgg5k

src/Storage/Device/S3.php

@@ -222,6 +222,7 @@ public static function setRetryDelay(int $delay): void
      *
      * @param  int  $retries  Must be >= 0
      * @return void
+     *
      * @throws \InvalidArgumentException
      */
     public static function setSlowDownMaxRetries(int $retries): void
@@ -239,6 +240,7 @@ public static function setSlowDownMaxRetries(int $retries): void
      *
      * @param  int  $delayMs  Must be > 0 and <= slowDownMaxDelayMs
      * @return void
+     *
      * @throws \InvalidArgumentException
      */
     public static function setSlowDownBaseDelay(int $delayMs): void
@@ -259,6 +261,7 @@ public static function setSlowDownBaseDelay(int $delayMs): void
      *
      * @param  int  $delayMs  Must be > 0 and >= slowDownBaseDelayMs
      * @return void
+     *
      * @throws \InvalidArgumentException
      */
     public static function setSlowDownMaxDelay(int $delayMs): void

tests/Storage/Device/S3SlowDownTest.php

@@ -40,6 +40,13 @@ protected function setUp(): void
         );
     }
 
+    protected function tearDown(): void
+    {
+        S3::setSlowDownMaxRetries(5);
+        S3::setSlowDownBaseDelay(100);
+        S3::setSlowDownMaxDelay(5000);
+    }
+
     // -----------------------------------------------------------------------
     // isTransientError — XML body detection
     // -----------------------------------------------------------------------
@@ -184,14 +191,12 @@ public function testSetSlowDownMaxRetries(): void
     {
         S3::setSlowDownMaxRetries(3);
         $this->assertSame(3, self::getStaticProp('slowDownMaxRetries'));
-        S3::setSlowDownMaxRetries(5); // restore default
     }
 
     public function testSetSlowDownMaxRetriesZeroIsAllowed(): void
     {
         S3::setSlowDownMaxRetries(0);
         $this->assertSame(0, self::getStaticProp('slowDownMaxRetries'));
-        S3::setSlowDownMaxRetries(5); // restore default
     }
 
     public function testSetSlowDownMaxRetriesNegativeThrows(): void
@@ -204,7 +209,6 @@ public function testSetSlowDownBaseDelay(): void
     {
         S3::setSlowDownBaseDelay(200);
         $this->assertSame(200, self::getStaticProp('slowDownBaseDelayMs'));
-        S3::setSlowDownBaseDelay(100); // restore default
     }
 
     public function testSetSlowDownBaseDelayZeroThrows(): void
@@ -230,7 +234,6 @@ public function testSetSlowDownMaxDelay(): void
     {
         S3::setSlowDownMaxDelay(10_000);
         $this->assertSame(10_000, self::getStaticProp('slowDownMaxDelayMs'));
-        S3::setSlowDownMaxDelay(5000); // restore default
     }
 
     public function testSetSlowDownMaxDelayZeroThrows(): void