HybridCacheService now sets WriteSynchronouslyWhenQueueFull = false

This better tolerates multi-instance situations where writes can't happen without outright failing requests.

Update lockfiles for libwebp fix

Add hints to /imageflow.debug for imageflow.toml config

Tweak github actions

Update imageflow

Fix build badge to point to new build script

Explicitly `<RestoreLockedMode>false</RestoreLockedMode>`

Update dotnet-core.yml

Update dotnet-core.yml

Update dotnet-core.yml