* Add PostgreSQL support for mint and wallet
* Fixed bug to avoid empty calls `get_proofs_states`
* Fixed SQL bug
* Avoid redudant clone()
* Add more tests for the storage layer
* Minor enhacements
* Add a generic function to execute db operations
This function would log slow operations and log errors
* Provision a postgres db for tests
* Update deps for msrv
* Add postgres to pipeline
* feat: add psgl to example and docker
* feat: db url fmt
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Co-authored-by: thesimplekid <tsk@thesimplekid.com>
