Feature/financial infos

postgres test still need to be fixed!

__Tasks__

- [x] financial fields to account
- [x] add bank accounts

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- [ ] gather feedback for my changes
- [ ] test coverage


| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| Tests pass?   | yes
| Fixed tickets | none
| Doc           | none