🚚 Better names, more relationships directly on File

[falexwolf]

• 🚚 Rename File.source to File.run (and File.source_id to File.run_id) and make optional
• 🚚 Rename created_by to created_by_id everywhere, add created_by_id to File and Storage
• 🚸 Add created_by back as relationship with type User
• 🚚 Add transform_id to File, and transform as a relationship
• 🚚 Rename File.targets to File.input_of
• 🚚 Rename Transform.v to Transform.version

[github-actions]

🚀 Deployed on https://643c14443f8df458dc2a6f11--lnschema-core-yvzi.netlify.app

[codecov]

Codecov Report

Merging #157 (b8bcf42) into main (43ec39a) will decrease coverage by 0.07%.
The diff coverage is 81.81%.

@@            Coverage Diff             @@
##             main     #157      +/-   ##
==========================================
- Coverage   69.65%   69.58%   -0.07%     
==========================================
  Files          14       14              
  Lines         547      559      +12     
==========================================
+ Hits          381      389       +8     
- Misses        166      170       +4     

Impacted Files	Coverage Δ
lnschema_core/_core.py	60.58% <80.64%> (+1.42%)	⬆️
lnschema_core/__init__.py	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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