Exposing durable logs

Previously we were displaying ephemeral logs from running instances in the web console.

We have switched to a Loki-powered log collection system, now all logs are available for viewing even after a container terminates.

During the beta period, the log retention period is 30 days at no extra cost.

Note: We may introduce fees based on the log storage volume to ensure fair usage of the platform.

P.S. We've also increased our test coverage and fixed many bugs in the process.