Remove db.expunge() calls that were causing DetachedInstanceError
when accessing lazy-loaded relationships in tests.
Changes:
- conftest.py: Add documentation about fixture best practices
- auth_fixtures: Remove expunge, keep objects attached to session
- customer_fixtures: Remove expunge, add proper relationship loading
- vendor_fixtures: Remove expunge, add test_company and other_company
fixtures for proper company-vendor relationship setup
- marketplace_import_job_fixtures: Remove expunge calls
- marketplace_product_fixtures: Remove expunge calls
The db fixture already provides test isolation by dropping/recreating
tables after each test, so expunge is unnecessary and harmful.
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Co-Authored-By: Claude <noreply@anthropic.com>
Samir Boulahtit
aaff799b5e