feat(retrieval): index markup, style, SQL, and project files

Add HTML, CSS, SCSS, XAML, SQL, XML, project, Razor, Kotlin, Gradle, and
module JavaScript files with SQL and Kotlin symbols, and rebuild the index.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/tests/test-retrieval-server.py

@@ -411,6 +411,8 @@ class RetrievalServerTests(unittest.TestCase):
             ('service.ts', 'export function load() {\n return 1;\n}\nexport const save = () => 2;\n', ['load', 'save']),
             ('service.cs', 'public class Service\n{\n public void Load()\n {\n }\n}\n', ['Service', 'Load']),
             ('setup.ps1', 'function Get-Result {\n return 1\n}\n', ['Get-Result']),
+            ('schema.sql', 'CREATE TABLE users (id int);\nCREATE OR ALTER PROCEDURE dbo.GetUser AS SELECT 1;\n', ['users', 'dbo.GetUser']),
+            ('Main.kt', 'fun main() {\n println(1)\n}\n', ['main']),
             ('config.toml', '[server]\nport = 1\n[client]\nport = 2\n', ['server', 'client']),
         ]:
             self.assertEqual([symbol for symbol, _ in MODULE.sections(source, path)], symbols)