Export-import object types with UUID retention

[CharString]

Fixes #565

Changes

Adds export to file action, and import from file to objecttype admin.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 99.20635% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 86.37%. Comparing base (8d03167) to head (ec33c14).
⚠️ Report is 16 commits behind head on master.

Files with missing lines	Patch %	Lines
src/objects/core/import_export.py	98.86%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #745      +/-   ##
==========================================
+ Coverage   85.58%   86.37%   +0.79%     
==========================================
  Files         144      145       +1     
  Lines        3003     3142     +139     
  Branches      236      253      +17     
==========================================
+ Hits         2570     2714     +144     
+ Misses        381      376       -5     
  Partials       52       52              

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[github-actions]

Bencher Report

Branch	565-exportimport-object-types-with-uuid-retention
Testbed	ubuntu-24.04

Click to view all benchmark results

Benchmark	Latency	Benchmark Result milliseconds (ms) (Result Δ%)	Upper Boundary milliseconds (ms) (Limit %)
performance_test/tests/test_objects_list.py::test_objects_api_list_filter_by_object_type	📈 view plot 🚷 view threshold	129.48 ms (+2.57%) Baseline: 126.25 ms	132.56 ms (97.68%)
performance_test/tests/test_objects_list.py::test_objects_api_list_filter_one_result	📈 view plot 🚷 view threshold	20.25 ms (+0.85%) Baseline: 20.08 ms	21.09 ms (96.04%)
performance_test/tests/test_objects_list.py::test_objects_api_list_large_page_size_page_1	📈 view plot 🚷 view threshold	336.00 ms (+3.29%) Baseline: 325.29 ms	341.56 ms (98.37%)
performance_test/tests/test_objects_list.py::test_objects_api_list_large_page_size_page_5	📈 view plot 🚷 view threshold	340.61 ms (+1.39%) Baseline: 335.93 ms	352.73 ms (96.56%)
performance_test/tests/test_objects_list.py::test_objects_api_list_small_page_size_page_20	📈 view plot 🚷 view threshold	130.72 ms (+2.13%) Baseline: 128.00 ms	134.40 ms (97.27%)

🐰 View full continuous benchmarking report in Bencher

[stevenbal]

@CharString could you add some basic documentation under Manual to describe how to do exports and imports?

[CharString]

@CharString could you add some basic documentation under Manual to describe how to do exports and imports?

@stevenbal I've put the documentation under Admin interface / object types where the other object type actions documented. But it can be moved of course.