fix(seeder): ensure SeederExecutor properly sorts seed files on fileName

[guillaumedeslandes]

Seed files are expected to be run in fileName order, same as migrations.

SeederExecutor.buildEntities method in place uses the name attribute (equal to className) to sort files.

Given the two files:

1. 001-customers.seed.ts, exporting a CustomersSeeder class
2. 002-contracts.seed.ts, exporting a ContractsSeeder` class

And given that the ContractsSeeder tries to fetch Customer entities, the seed:run command will fail when sorting seeds by className.

This pull request changes the sort call to use the fileName attribute instead.

[tada5hi]

thanks, good catch!
i have already checked for the filename property, but then foolishly compared the name.

[github-actions]

🎉 This PR is included in version 3.0.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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