fix(tests): add explicit types to integration test queries

Fix TypeScript implicit any errors in migrate integration tests.

- Add explicit type parameters to sql query results

- Specify return types for all database queries

- Resolves CI/CD build failure

Fixes #39

Author: danielvm-ciandt

tests/integration/migrate.integration.test.ts

@@ -177,7 +177,7 @@ DROP TABLE IF EXISTS test_periodic_table;
       // STEP 5: Verify table exists in database
       // ============================================
 
-      const tables = await sql(`
+      const tables = await sql<Array<{ tablename: string }>>(`
         SELECT tablename FROM pg_tables 
         WHERE schemaname = 'public' 
         AND tablename = 'test_periodic_table'
@@ -187,7 +187,7 @@ DROP TABLE IF EXISTS test_periodic_table;
       expect(tables[0].tablename).toBe('test_periodic_table');
 
       // Verify data was inserted
-      const data = await sql('SELECT * FROM test_periodic_table WHERE "AtomicNumber" = 10');
+      const data = await sql<Array<{ Element: string; Symbol: string }>>('SELECT * FROM test_periodic_table WHERE "AtomicNumber" = 10');
       expect(data).toHaveLength(1);
       expect(data[0].Element).toBe('Neon');
       expect(data[0].Symbol).toBe('Ne');
@@ -206,7 +206,7 @@ DROP TABLE IF EXISTS test_periodic_table;
       // STEP 7: Verify schema_migrations updated
       // ============================================
 
-      const migrations = await sql(`
+      const migrations = await sql<Array<{ version: string; applied_at: Date }>>(`
         SELECT version, applied_at 
         FROM schema_migrations 
         WHERE version = $1
@@ -230,7 +230,7 @@ DROP TABLE IF EXISTS test_periodic_table;
       // STEP 9: Verify table dropped
       // ============================================
 
-      const tablesAfterRollback = await sql(`
+      const tablesAfterRollback = await sql<Array<{ tablename: string }>>(`
         SELECT tablename FROM pg_tables 
         WHERE schemaname = 'public' 
         AND tablename = 'test_periodic_table'
@@ -242,7 +242,7 @@ DROP TABLE IF EXISTS test_periodic_table;
       // STEP 10: Verify schema_migrations updated
       // ============================================
 
-      const migrationsAfterRollback = await sql(`
+      const migrationsAfterRollback = await sql<Array<{ version: string }>>(`
         SELECT version 
         FROM schema_migrations 
         WHERE version = $1
@@ -260,7 +260,7 @@ DROP TABLE IF EXISTS test_periodic_table;
       expect(upAgainOutput).toMatch(/applied|✅/i);
 
       // Verify table exists again
-      const tablesReapplied = await sql(`
+      const tablesReapplied = await sql<Array<{ tablename: string }>>(`
         SELECT tablename FROM pg_tables 
         WHERE schemaname = 'public' 
         AND tablename = 'test_periodic_table'