Issue #438: Fix import-path of CurrencyMismatch

[Newspaperman57]

Fixed the import-path of CurrencyMismatch from base -> elspot, based on recommendation of the author in this issue, and pinned the nordpool-package to >=0.4.3,<1 to avoid jumping major versions in the future.

A lot of users are affected since the release of 2024.11, many will be upgrading their homeassistant-instance, and therefore the nordpool package - this is what happened to me.

I believe this is a better fix than PR #439

Tested in my private homeassistant

Fixes issue #438

[cagemaan]

Looks good, tested the changes on my own HA running core 2024.10.4

[developerfromjokela]

Fixed the import-path of CurrencyMismatch from base -> elspot, based on recommendation of the author in this issue, and pinned the nordpool-package to >=0.4.3,<1 to avoid jumping major versions in the future.

A lot of users are affected since the release of 2024.11, many will be upgrading their homeassistant-instance, and therefore the nordpool package - this is what happened to me.

I believe this is a better fix than PR #439

Tested in my private homeassistant

Fixes issue #438

About being a better fix, imo whole library is really useless for this project. For future, I think it would be beneficial to stop relying on that library completely. It's mainly imported for classes, exceptions, etc. Almost nothing is imported for the actual logic. Most methods are overriden anyways by this library, especially after new API update.

[Hellowlol]

Thanks for the PR, but i decided to merge the other fix instead. I think we should just remove the nordpool dependancy. As @developerfromjokela mentioned. We really dont need much from it anyway, the reason for using it more for historical reasons as i contributed the async API to the nordpool package, but it wasnt merged in the package at the time.