Refactor test database setup and add migrations

- Updated test files to use a separate test database configuration.
- Introduced a new helper module for managing test database operations.
- Added a setup file to configure the environment for tests.
- Created new database migration scripts to optimize message indexing.
- Added a sample environment file for test database configuration.

tests/moderation/messageCapture.test.ts

@@ -7,11 +7,12 @@ import {
   it,
   vi,
 } from "vitest";
+import { closeDatabase } from "../../src/database/drizzle";
 import {
-  closeDatabase,
-  getDatabase,
-  initializeDatabase,
-} from "../../src/database/drizzle";
+  clearTestTables,
+  getTestDatabase,
+  initializeTestDatabase,
+} from "../helpers/testDatabase";
 import { captureMessage } from "../../src/moderation/messageCapture";
 import type { ModerationBroadcaster } from "../../src/moderation/types";
 
@@ -22,14 +23,6 @@ type ModerationTestGlobal = typeof globalThis & {
   moderationBroadcaster?: Partial<ModerationBroadcaster>;
 };
 
-interface TestDatabase {
-  run(sql: string): Promise<unknown>;
-}
-
-function getTestDatabase(): TestDatabase {
-  return getDatabase() as unknown as TestDatabase;
-}
-
 vi.mock("../../src/moderation/aiAnalyzer", () => ({
   queueMessageAnalysis: (id: string) => queueMessageAnalysis(id),
 }));
@@ -118,15 +111,13 @@ async function createTables() {
 
 describe("captureMessage", () => {
   beforeAll(async () => {
-    await initializeDatabase();
+    await initializeTestDatabase();
     await createTables();
   });
 
   beforeEach(async () => {
     queueMessageAnalysis.mockClear();
-    const db = getTestDatabase();
-    await db.run(`DELETE FROM "attachments"`);
-    await db.run(`DELETE FROM "messages"`);
+    await clearTestTables("attachments", "messages");
     delete (globalThis as ModerationTestGlobal).moderationBroadcaster;
   });