Add proper foreign keys to all document related tables

Foreign keys that contain  ON DELETE CASCADE that is.

resources/migrations/20241008082211-add-foreign-keys-to-document-child-tables.down.sql

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+-- this change cannot be undone, sorry

resources/migrations/20241008082211-add-foreign-keys-to-document-child-tables.up.sql

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+-- Drop the old foreign key indexes
+-- because they are not ON DELETE CASCADE
+-- or because they do not conform to the naming scheme
+
+ALTER TABLE dictionary_localword
+DROP FOREIGN KEY IF EXISTS dictionary_localword_ibfk_1;
+
+--;;
+
+ALTER TABLE documents_version
+DROP FOREIGN KEY IF EXISTS documents_version_documents_document;
+
+--;;
+
+ALTER TABLE documents_version
+DROP FOREIGN KEY IF EXISTS document_id_refs_id_6e9aeb8bd76a8925;
+
+--;;
+
+ALTER TABLE documents_image
+DROP FOREIGN KEY IF EXISTS document_id_refs_id_7dcae6cd2eb4b4cc;
+
+--;;
+
+ALTER TABLE documents_product
+DROP FOREIGN KEY IF EXISTS document_id_refs_id_7ff5341caa42ce0c;
+
+--;;
+
+-- then add the new foreign keys
+
+ALTER TABLE dictionary_unknownword
+ADD CONSTRAINT fk_dictionary_unknownword__documents_document
+FOREIGN KEY (document_id) REFERENCES documents_document (id)
+ON DELETE CASCADE;
+
+--;;
+
+ALTER TABLE dictionary_localword
+ADD CONSTRAINT fk_dictionary_localword__documents_document
+FOREIGN KEY (document_id) REFERENCES documents_document (id)
+ON DELETE CASCADE;
+
+--;;
+
+ALTER TABLE documents_version
+ADD CONSTRAINT fk_documents_version__documents_document
+FOREIGN KEY (document_id) REFERENCES documents_document (id)
+ON DELETE CASCADE;
+
+--;;
+
+ALTER TABLE documents_image
+ADD CONSTRAINT fk_documents_image__documents_document
+FOREIGN KEY (document_id) REFERENCES documents_document (id)
+ON DELETE CASCADE;
+
+--;;
+
+ALTER TABLE documents_product
+ADD CONSTRAINT fk_documents_product__documents_document
+FOREIGN KEY (document_id) REFERENCES documents_document (id)
+ON DELETE CASCADE;