Migrate to eslint flat config #7046

Job	Run time
Lint / ESLint	29s
Build / Node.js 20	2m 15s
Test / Unit	40s
Renovate / Validate config	34s
Build / Node.js 22	2m 22s
Docker (amd64) / Build: web	4m 13s
Docker (amd64) / Build: worker	1m 38s
Docker (amd64) / Build: legacy-importer	1m 29s
Docker (amd64) / Build: database-migration	26s
Docker (amd64) / Build: e2e	1m 2s
Docker (arm64) / Build: web	17m 7s
Docker (arm64) / Build: worker	6m 8s
Docker (arm64) / Build: legacy-importer	3m 38s
Docker (arm64) / Build: database-migration	24s
Docker (arm64) / Build: e2e	2m 2s
Docker (amd64) / Test: docker compose	1m 36s
Docker (amd64) / Test: e2e	1m 33s
Docker (amd64) / Test: kubernetes	3m 2s
Docker (arm64) / Test: docker compose	0s
Docker (arm64) / Test: kubernetes	0s
Docker (arm64) / Test: e2e	0s
Success	1s
Publish (docker)	0s
Publish (npm)	0s
	50m 39s

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