fix(backend-test-utils): increase MySQL connect and pool timeouts

The mysql2 driver defaults to a 10-second connect timeout, which is
too short when many test suites share a single MySQL container under
CI load. Increase the connect timeout to 30 seconds and add pool
acquire/create timeouts of 30 seconds to reduce flaky ETIMEDOUT
failures.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Fredrik Adelöw <freben@gmail.com>

packages/backend-test-utils/src/database/mysql.ts

@@ -176,6 +176,7 @@ export class MysqlEngine implements Engine {
         connection: {
           ...this.#connection,
           database: databaseName,
+          connectTimeout: 30_000,
         },
         ...LARGER_POOL_CONFIG,
       });

packages/backend-test-utils/src/database/types.ts

@@ -129,5 +129,7 @@ export const LARGER_POOL_CONFIG = {
   pool: {
     min: 0,
     max: 50,
+    acquireTimeoutMillis: 30_000,
+    createTimeoutMillis: 30_000,
   },
 };