Exposing rust calc_spot_price_after_long

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 90.00000% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 80.65%. Comparing base (d2a932c) to head (2a4857d).

Files	Patch %	Lines
...gent0/ethpy/hyperdrive/interface/_mock_contract.py	83.33%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1446 +/- ## ========================================== + Coverage 80.63% 80.65% +0.01% ========================================== Files 104 104 Lines 6441 6451 +10 ========================================== + Hits 5194 5203 +9 - Misses 1247 1248 +1 ``` | [Flag](https://app.codecov.io/gh/delvtech/agent0/pull/1446/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=delvtech) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/delvtech/agent0/pull/1446/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=delvtech) | `80.65% <90.00%> (+0.01%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=delvtech#carryforward-flags-in-the-pull-request-comment) to find out more.

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.