Posisble for Redis/Valkey Instance state cache to get out of sync with platform

[hardillb]

Current Behavior

If Forge application shuts down while an instance is being suspended it is possible for the entry in the cache to get stuck in the suspending state.

Expected Behavior

Transient states should expire and be checked against the underlying platform.

Steps To Reproduce

• Start and instance
• Suspend an instance
• before it completes kill the forge app

Environment

• FlowFuse version: 2.28.0
• Node.js version: 20
• npm version: 10.x
• Platform/OS: k8s
• Browser: all

Have you provided an initial effort estimate for this issue?

I have provided an initial effort estimate