Flintlock is failing with Firecracker v1.5.0

**What happened:**

When using the latest version of flintlock with Firecracker v1.5.0 its failing to properly start a VM.

Seeing errors like this in the flintlock logs:

```text
2025/11/27 19:12:08 ERROR: Failed to extract ServerMetadata from context
...
time="2025-11-27T19:15:51+01:00" level=error msg="microvm reconciliation for default/972334c2-7f9f-4241-82c6-3e9c61036ced/01KAY9QA4KW1AN7Y72JGA6YKJT failed 11 times" action=reconcile controller=microvm
```

**What did you expect to happen:**

I expect the VM to start without errors.

**How to reproduce it:**

**Anything else you would like to add:**
[Miscellaneous information that will assist in solving the issue.]

**Environment:**

- flintlock version:
- containerd version:
- OS (e.g. from `/etc/os-release`):