Support aggregation of attributes from multiple databases #174

Job	Run time
PHP-Linter (8.1) / linter	14s
PHP-Linter (8.4) / linter	12s
PHP-Linter (8.3) / linter	11s
Linter / yaml-linter	5s
Linter / json-linter	25s
PHP-Linter (8.2) / linter	9s
Linter / ecmascript-linter	0s
Linter / style-linter	0s
Unit tests, PHP 8.2, windows-latest	1m 23s
Unit tests, PHP 8.4, windows-latest	1m 11s
Unit tests, PHP 8.3, windows-latest	1m 14s
Unit tests, PHP 8.2, ubuntu-latest	39s
Unit tests, PHP 8.4, ubuntu-latest	49s
Unit tests, PHP 8.5, windows-latest	1m 12s
Unit tests, PHP 8.5, ubuntu-latest	48s
Unit tests, PHP 8.3, ubuntu-latest	40s
Quality control	33s
Security checks	34s
Code coverage	10s
Cleanup artifacts	5s
	10m 34s

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