Register FIB data

[tieneupin]

This PR adds the components needed to begin analysing and processing FIB data.

• Added a new FastAPI router, API end point, workflow, and entry point to use for registering FIB atlas images
• Added logic to the FIB Context to trigger the registration of FIB atlas images
• Added new columns to the ImagingSite table to keep track of stage position information in the FIB
• Enabled and fixed a prior workflow that was set up to create GIFs of the milling sites as images are acquired
• Added tests and fixed old ones

Actual changes to the code make up about 400 insertions and 200 deletions, with the updating and adding of tests taking up the remainder of the diff.

[codecov]

Codecov Report

❌ Patch coverage is 86.14458% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 49.92%. Comparing base (24e6c5f) to head (0d96dfe).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #766      +/-   ##
==========================================
+ Coverage   49.33%   49.92%   +0.59%     
==========================================
  Files          92       94       +2     
  Lines        9826     9922      +96     
  Branches     1298     1295       -3     
==========================================
+ Hits         4848     4954     +106     
+ Misses       4726     4714      -12     
- Partials      252      254       +2     

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