Fix State copy/deepcopy

Fix State copy/deepcopy

Quality of life improvements

Add required parameter for accessing env variables
Add builtin collection types conversion

Fix potential memory issues with default metrics handler

Fix potential memory issues with default metrics handler

Fix metrics summary log

Fix metrics summary log

Rework context metrics

Rework context metrics
Update example

Fix type parameters name

Fix type parameters name

Implement custom State type checks

Implement custom State type checks

Allow TypedDict in State and refine type resolving

Allow TypedDict in State

Fix path name conflict

Fix path name conflict

Add attribute paths

Update postgres example
Add attribute paths