test(products): add 57 critical CRUD operation tests for Products module

Add comprehensive unit tests for previously untested critical CRUD methods:
- Product card creation (createCardsUpload) - 8 tests
- Product card updates (createCardsUpdate) - 6 tests
- Move to trash/soft delete (createCardsTrash) - 6 tests
- Recover from trash (createCardsRecover) - 5 tests
- Permanent deletion (createDeleteTrash) - 6 tests
- Tag management (create/update/delete) - 11 tests
- Barcode generation (createContentBarcodes) - 8 tests
- Nomenclature merge/split (createCardsMovenm) - 7 tests

Impact:
- Total tests: 1527 → 1584 (+57 new tests)
- All 1584 tests passing (100% success rate)
- Improved Products module function coverage from 33.82%
- Zero regressions, all existing tests continue to pass

These tests cover HIGH RISK operations affecting product lifecycle,
inventory management, and financial operations.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: salacoste