Refactored Model, added Loader::isRegistered, fixed Metadata behaviour #1529

Job	Run time
Setup workflow	1s
phpcs / Check code style	21s
install / Build for PHP 7.4-nts-x64	2m 24s
install / Build for PHP 8.0-nts-x64	3m 11s
install / Build for PHP 8.1-nts-x64	3m 11s
install / Build for PHP 8.2-nts-x64	3m 22s
generate / Build Phalcon PECL package	1m 3s
stubs / Check with Psalm / PHP 7.4	1m 5s
stubs / Check with Psalm / PHP 8.0	53s
stubs / Check with Psalm / PHP 8.1	1m 4s
stubs / Check with Psalm / PHP 8.2	55s
tests / PHP-7.4-nts-ubuntu-gcc-x64	5m 40s
tests / PHP-7.4-nts-macos-clang-x64	7m 5s
tests / PHP-7.4-ts-ubuntu-gcc-x64	6m 58s
tests / PHP-7.4-ts-macos-clang-x64	7m 19s
tests / PHP-8.0-nts-ubuntu-gcc-x64	5m 26s
tests / PHP-8.0-nts-macos-clang-x64	9m 8s
tests / PHP-8.0-ts-ubuntu-gcc-x64	5m 35s
tests / PHP-8.0-ts-macos-clang-x64	7m 50s
tests / PHP-8.1-nts-ubuntu-gcc-x64	5m 27s
tests / PHP-8.1-nts-macos-clang-x64	7m 27s
tests / PHP-8.1-ts-ubuntu-gcc-x64	5m 31s
tests / PHP-8.1-ts-macos-clang-x64	9m 12s
tests / PHP-8.2-nts-ubuntu-gcc-x64	6m 32s
tests / PHP-8.2-nts-macos-clang-x64	7m 4s
tests / PHP-8.2-ts-ubuntu-gcc-x64	5m 44s
tests / PHP-8.2-ts-macos-clang-x64	7m 32s
tests / PHP-7.4-ts-windows2019-vc15-x64	8m 6s
tests / PHP-7.4-nts-windows2019-vc15-x64	7m 52s
tests / PHP-8.0-ts-windows2019-vs16-x64	7m 34s
tests / PHP-8.0-nts-windows2019-vs16-x64	6m 47s
tests / PHP-8.1-ts-windows2019-vs16-x64	7m 56s
tests / PHP-8.1-nts-windows2019-vs16-x64	8m 2s
integration-test (7.4)	6m 14s
integration-test (8.0)	7m 4s
integration-test (8.1)	6m 21s
integration-test (8.2)	8m 5s
Create Release	0s
	3h 21m 1s

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