add configurable support for both raw and base64 uploads

[briantist]

Fixes #105

[codecov[bot]]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (1c706dd) 61.58% compared to head (ed5793f) 62.60%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #109 +/- ## ========================================== + Coverage 61.58% 62.60% +1.02% ========================================== Files 32 33 +1 Lines 1463 1511 +48 ========================================== + Hits 901 946 +45 - Misses 562 565 +3 ``` | [Files](https://app.codecov.io/gh/briantist/galactory/pull/109?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Brian+Scholer) | Coverage Δ | | |---|---|---| | [galactory/utilities.py](https://app.codecov.io/gh/briantist/galactory/pull/109?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Brian+Scholer#diff-Z2FsYWN0b3J5L3V0aWxpdGllcy5weQ==) | `44.52% <100.00%> (+7.31%)` | :arrow_up: | | [tests/unit/conftest.py](https://app.codecov.io/gh/briantist/galactory/pull/109?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Brian+Scholer#diff-dGVzdHMvdW5pdC9jb25mdGVzdC5weQ==) | `92.85% <100.00%> (+0.06%)` | :arrow_up: | | [.../unit/utilities/test\_incoming\_collection\_stream.py](https://app.codecov.io/gh/briantist/galactory/pull/109?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Brian+Scholer#diff-dGVzdHMvdW5pdC91dGlsaXRpZXMvdGVzdF9pbmNvbWluZ19jb2xsZWN0aW9uX3N0cmVhbS5weQ==) | `100.00% <100.00%> (ø)` | | | [galactory/\_\_init\_\_.py](https://app.codecov.io/gh/briantist/galactory/pull/109?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Brian+Scholer#diff-Z2FsYWN0b3J5L19faW5pdF9fLnB5) | `31.25% <0.00%> (-0.33%)` | :arrow_down: | | [galactory/api/v2/collections.py](https://app.codecov.io/gh/briantist/galactory/pull/109?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Brian+Scholer#diff-Z2FsYWN0b3J5L2FwaS92Mi9jb2xsZWN0aW9ucy5weQ==) | `18.48% <0.00%> (-0.85%)` | :arrow_down: | | [galactory/api/v3/collections.py](https://app.codecov.io/gh/briantist/galactory/pull/109?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Brian+Scholer#diff-Z2FsYWN0b3J5L2FwaS92My9jb2xsZWN0aW9ucy5weQ==) | `23.25% <0.00%> (-0.78%)` | :arrow_down: |

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