First working Exposed-assisted persistent wallet
Cleaned up Exposed-based persistent wallet
Cleaned up warnings
Fixed up some generic types
Improved comments
Fix up TODO comment
Hikari and config integration
Fix existing tests
Clean up after looking at PR
Clean up commented out lines
Fix initialisation of IRS demo leaving database open
Fix up after rebase
Review feedback. Main change is lazy wallet iteration.
Rebased and incorporated config changes.
Use standardised config loading. Make wallet cash test use persistent wallet.
Added test to ensure wallet retains state in database across instance creation.
Tidy up whitespace and fix bug in test.
