Add regression tests and fix for registering names against dead PIDs - #499

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@v4, actions/checkout@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

• Deriving ‘Typeable’ has no effect: all types now auto-derive Typeable

Defined but not used: ‘syncBreakConnection’

• Deriving ‘Typeable’ has no effect: all types now auto-derive Typeable

• Deriving ‘Typeable’ has no effect: all types now auto-derive Typeable

In the use of ‘bracket’

Defined but not used: ‘registerSelf__tdict’

In the use of ‘bracket’

In the use of ‘head’

Redundant constraints: (Typeable a, Typeable b, Typeable c,

• Deriving ‘Typeable’ has no effect: all types now auto-derive Typeable