Parse FIB AutoTEM metadata

[tieneupin]

This PR adds additional logic to the FIBContext class to parse the AutoTEM metadata file ProjectData.dat, along with a stub endpoint on the backend that will be developed subsequently into a function that registers the received metadata appropriately.

This master file contains information on all the lamella sites that have been set up, along with the parameters for every possible milling step for each lamella site. Due to its massive size, we have implemented logic such that metadata info for a given lamella site is only submitted to the backend for consideration when a change is detected.

This metadata file will be repeatedly overwritten and updated by AutoTEM as it progresses through the various milling stages, so logic was also added to save a snapshot of the file whenever it passes through the FIBContext.

Actual changes to the code correspond to about +530/-50 lines, with the rest of the diff being due to the addition of tests.

[codecov]

Codecov Report

❌ Patch coverage is 52.80899% with 84 lines in your changes missing coverage. Please review.
✅ Project coverage is 50.84%. Comparing base (3d23916) to head (5059f4e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #786      +/-   ##
==========================================
+ Coverage   50.72%   50.84%   +0.12%     
==========================================
  Files          96       96              
  Lines       10059    10207     +148     
  Branches     1322     1341      +19     
==========================================
+ Hits         5102     5190      +88     
- Misses       4690     4752      +62     
+ Partials      267      265       -2     

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