add tween to force close transaction after request/response handling

[fmigneault]

changes

• add tween to force close transaction after request/response handling
• unpin alembic for latest updates

[codecov[bot]]

Codecov Report

Patch coverage: 88.88% and no project coverage change.

Comparison is base (7f0f41b) 80.76% compared to head (79adc18) 80.76%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #580 +/- ## ======================================= Coverage 80.76% 80.76% ======================================= Files 73 73 Lines 10151 10160 +9 Branches 1815 1816 +1 ======================================= + Hits 8198 8206 +8 Misses 1630 1630 - Partials 323 324 +1 ``` | [Impacted Files](https://codecov.io/gh/Ouranosinc/Magpie/pull/580?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Ouranosinc) | Coverage Δ | | |---|---|---| | [magpie/utils.py](https://codecov.io/gh/Ouranosinc/Magpie/pull/580?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Ouranosinc#diff-bWFncGllL3V0aWxzLnB5) | `69.10% <88.88%> (+0.33%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Ouranosinc). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Ouranosinc)

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