Add integration tests for @throws docblock dependency collection

Add two integration tests to verify that dependencies defined in @throws
docblock tags are properly collected:
- test_it_collects_throws_tag_as_dependencies: Tests collection of relative
  and fully qualified exception names in @throws tags
- test_it_collects_throws_tag_with_fully_qualified_names: Tests handling of
  different naming conventions (backslash-prefixed, relative to namespace)

These tests validate that the @throws tag parsing feature works end-to-end
and that exceptions are properly resolved to their fully qualified names.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Haiku 4.5 <[email protected]>

Author: fain182

tests/Unit/Analyzer/FileParser/CanParseDocblocksTest.php

@@ -495,4 +495,87 @@ class ApplicationLevelDto
 
         self::assertCount(1, $violations);
     }
+
+    public function test_it_collects_throws_tag_as_dependencies(): void
+    {
+        $code = <<< 'EOF'
+        <?php
+
+        namespace Domain\Foo;
+
+        use Domain\FooException;
+        use Domain\BarException;
+
+        class MyClass
+        {
+            /**
+             * @throws FooException
+             * @throws BarException
+             */
+            public function method1()
+            {
+            }
+
+            /**
+             * @throws \Exception
+             */
+            public function method2()
+            {
+            }
+        }
+        EOF;
+
+        $fp = FileParserFactory::forPhpVersion(TargetPhpVersion::PHP_7_4);
+        $fp->parse($code, 'relativePathName');
+
+        $cd = $fp->getClassDescriptions();
+
+        self::assertCount(1, $cd);
+        $dependencies = $cd[0]->getDependencies();
+
+        // Should have 3 dependencies from @throws: FooException, BarException, Exception
+        self::assertCount(3, $dependencies);
+
+        $fqcns = array_map(static fn ($dep) => $dep->getFQCN()->toString(), $dependencies);
+        self::assertContains('Domain\FooException', $fqcns);
+        self::assertContains('Domain\BarException', $fqcns);
+        self::assertContains('Exception', $fqcns);
+    }
+
+    public function test_it_collects_throws_tag_with_fully_qualified_names(): void
+    {
+        $code = <<< 'EOF'
+        <?php
+
+        namespace App\Services;
+
+        class MyService
+        {
+            /**
+             * @throws \Exception
+             * @throws \Domain\FooException
+             * @throws BarException
+             */
+            public function doSomething()
+            {
+            }
+        }
+        EOF;
+
+        $fp = FileParserFactory::forPhpVersion(TargetPhpVersion::PHP_8_1);
+        $fp->parse($code, 'relativePathName');
+
+        $cd = $fp->getClassDescriptions();
+
+        self::assertCount(1, $cd);
+        $dependencies = $cd[0]->getDependencies();
+
+        // Should have 3 dependencies from @throws
+        self::assertCount(3, $dependencies);
+
+        $fqcns = array_map(static fn ($dep) => $dep->getFQCN()->toString(), $dependencies);
+        self::assertContains('Exception', $fqcns);
+        self::assertContains('Domain\FooException', $fqcns);
+        self::assertContains('App\Services\BarException', $fqcns);
+    }
 }