[Database] Add Primary ID Keys to Tables (#2036)

utils/sql/git/required/2022_03_06_table_structure_changes.sql

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+ALTER TABLE `pets` DROP PRIMARY KEY;
+ALTER TABLE `pets` ADD `id` int(20) PRIMARY KEY NOT NULL AUTO_INCREMENT FIRST;
+CREATE UNIQUE INDEX `type_petpower` ON pets (type, petpower);
+
+ALTER TABLE `horses` DROP PRIMARY KEY;
+ALTER TABLE `horses` ADD `id` int(20) PRIMARY KEY NOT NULL AUTO_INCREMENT FIRST;
+CREATE UNIQUE INDEX `filename` ON horses (filename);
+
+ALTER TABLE books DROP INDEX `id`;
+ALTER TABLE `books` ADD `id` int(20) PRIMARY KEY NOT NULL AUTO_INCREMENT FIRST;
+CREATE UNIQUE INDEX `filename` ON books (name);