[Database] Add Custom Database Migrations for Operators (#4892)

* [Database] Add Custom Database Migrations for Operators

* Changes

* Update database_update_manifest_custom.cpp

common/database/database_update_manifest_custom.cpp

@@ -0,0 +1,55 @@
+#include "database_update.h"
+
+std::vector<ManifestEntry> manifest_entries_custom = {
+	ManifestEntry{
+		.version = 1,
+		.description = "2025_05_16_new_database_check_test",
+		.check = "SHOW TABLES LIKE 'new_table'",
+		.condition = "empty",
+		.match = "",
+		.sql = R"(
+CREATE TABLE `new_table`  (
+  `id` int NOT NULL AUTO_INCREMENT,
+  PRIMARY KEY (`id`)
+);
+)",
+		.content_schema_update = false,
+	},
+// Used for testing
+//	ManifestEntry{
+//		.version = 9229,
+//		.description = "new_database_check_test",
+//		.check = "SHOW TABLES LIKE 'new_table'",
+//		.condition = "empty",
+//		.match = "",
+//		.sql = R"(
+//CREATE TABLE `new_table`  (
+//  `id` int NOT NULL AUTO_INCREMENT,
+//  PRIMARY KEY (`id`)
+//);
+//CREATE TABLE `new_table1`  (
+//  `id` int NOT NULL AUTO_INCREMENT,
+//  PRIMARY KEY (`id`)
+//);
+//CREATE TABLE `new_table2`  (
+//  `id` int NOT NULL AUTO_INCREMENT,
+//  PRIMARY KEY (`id`)
+//);
+//CREATE TABLE `new_table3`  (
+//  `id` int NOT NULL AUTO_INCREMENT,
+//  PRIMARY KEY (`id`)
+//);
+//)",
+//	}
+
+};
+
+// see struct definitions for what each field does
+// struct ManifestEntry {
+// 	int         version{};     // database version of the migration
+// 	std::string description{}; // description of the migration ex: "add_new_table" or "add_index_to_table"
+// 	std::string check{};       // query that checks against the condition
+// 	std::string condition{};   // condition or "match_type" - Possible values [contains|match|missing|empty|not_empty]
+// 	std::string match{};       // match field that is not always used, but works in conjunction with "condition" values [missing|match|contains]
+// 	std::string sql{};         // the SQL DDL that gets ran when the condition is true
+// };