Migrate to eslint flat config #7048

Job	Run time
Lint / ESLint	35s
Build / Node.js 20	2m 14s
Renovate / Validate config	32s
Build / Node.js 22	2m 8s
Test / Unit	37s
Docker (amd64) / Build: web	3m 45s
Docker (amd64) / Build: worker	1m 36s
Docker (amd64) / Build: legacy-importer	1m 22s
Docker (amd64) / Build: database-migration	37s
Docker (amd64) / Build: e2e	1m 12s
Docker (arm64) / Build: web	16m 35s
Docker (arm64) / Build: worker	6m 20s
Docker (arm64) / Build: legacy-importer	3m 41s
Docker (arm64) / Build: database-migration	36s
Docker (arm64) / Build: e2e	1m 47s
Docker (amd64) / Test: kubernetes	3m 8s
Docker (amd64) / Test: e2e	1m 21s
Docker (amd64) / Test: docker compose	1m 28s
Docker (arm64) / Test: docker compose	0s
Docker (arm64) / Test: kubernetes	0s
Docker (arm64) / Test: e2e	0s
Success	1s
Publish (npm)	0s
Publish (docker)	0s
	49m 35s

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