Flaky E2E: test_cross_environment_isolation fails with server startup timeout

[vieiralucas]

Description

The test_cross_environment_isolation E2E test intermittently fails in CI with:

Error: "Server failed to become ready within 12 seconds"

Impact

This is a flaky infrastructure failure, not a code issue. It causes CI pipelines to fail spuriously — observed on PRs #82 (and likely others). All other 59 E2E tests pass when this occurs.

Location

• Test file: apps/e2e-test/tests/rbac.rs — test_cross_environment_isolation
• CI run example: https://github.com/faiscadev/zopp/actions/runs/22927252560/job/66540569868

Possible Causes

• Server startup takes longer under CI load, exceeding the 12-second timeout
• Port contention when multiple E2E tests spawn servers concurrently

Suggested Fix

• Increase the server readiness timeout (e.g., 30 seconds)
• Add retry logic for server startup in the E2E test harness
• Or investigate if the test can reuse a shared server instance