Refactored Model, added Loader::isRegistered, fixed Metadata behaviour #1537

Job	Run time
Setup workflow	1s
phpcs / Check code style	19s
generate / Build Phalcon PECL package	54s
install / Build for PHP 7.4-nts-x64	2m 24s
install / Build for PHP 8.0-nts-x64	4m 6s
install / Build for PHP 8.1-nts-x64	3m 20s
install / Build for PHP 8.2-nts-x64	3m 20s
stubs / Check with Psalm / PHP 7.4	56s
stubs / Check with Psalm / PHP 8.0	1m 2s
stubs / Check with Psalm / PHP 8.1	1m 3s
stubs / Check with Psalm / PHP 8.2	1m 13s
integration-test (7.4)	5m 17s
integration-test (8.0)	7m 30s
integration-test (8.1)	7m 38s
integration-test (8.2)	6m 4s
tests / PHP-7.4-nts-ubuntu-gcc-x64	6m 19s
tests / PHP-7.4-nts-macos-clang-x64	7m 42s
tests / PHP-7.4-ts-ubuntu-gcc-x64	6m 5s
tests / PHP-7.4-ts-macos-clang-x64	14m 54s
tests / PHP-8.0-nts-ubuntu-gcc-x64	6m 33s
tests / PHP-8.0-nts-macos-clang-x64	9m 5s
tests / PHP-8.0-ts-ubuntu-gcc-x64	5m 41s
tests / PHP-8.0-ts-macos-clang-x64	7m 32s
tests / PHP-8.1-nts-ubuntu-gcc-x64	6m 21s
tests / PHP-8.1-nts-macos-clang-x64	9m 14s
tests / PHP-8.1-ts-ubuntu-gcc-x64	6m 9s
tests / PHP-8.1-ts-macos-clang-x64	9m 4s
tests / PHP-8.2-nts-ubuntu-gcc-x64	5m 36s
tests / PHP-8.2-nts-macos-clang-x64	9m 47s
tests / PHP-8.2-ts-ubuntu-gcc-x64	5m 46s
tests / PHP-8.2-ts-macos-clang-x64	8m 57s
tests / PHP-7.4-ts-windows2019-vc15-x64	6m 41s
tests / PHP-7.4-nts-windows2019-vc15-x64	8m 53s
tests / PHP-8.0-ts-windows2019-vs16-x64	7m 37s
tests / PHP-8.0-nts-windows2019-vs16-x64	9m 13s
tests / PHP-8.1-ts-windows2019-vs16-x64	10m 24s
tests / PHP-8.1-nts-windows2019-vs16-x64	8m 33s
Create Release	0s
	3h 41m 13s

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