fix: writer/reader correctness and determinism issues

- merge: cloneTable keeps relationships; skip-tables applies to new schemas
- diff: detect schema description/owner changes
- prisma: reader no longer turns relation fields into columns, enum
  detection via declared names; writer type mapping is ordered
- typeorm writer: keep explicit SQL types that cannot be inferred
- drizzle: enum columns call the enum constant; reader resolves them
- mysql/mssql/sqlite writers: honour OutputPath, deterministic column
  and constraint order; mssql live execute covers full schema
- template: ToYAML recovers from panics; Merge nil-pointer loop
- regenerate drizzle fixtures

tests/assets/drizzle/schema-updated.ts

@@ -17,7 +17,7 @@ export const users = pgTable('users', {
   lastLoginAt: timestamp('last_login_at'),
   passwordHash: varchar('password_hash').notNull(),
   profile: jsonb('profile'),
-  role: pgEnum('UserRole')('role').notNull(),
+  role: userRole('role').notNull(),
   updatedAt: timestamp('updated_at').notNull().default(sql`now()`),
   username: varchar('username').notNull().unique(),
 });
@@ -131,7 +131,7 @@ export const orders = pgTable('orders', {
   notes: text('notes'),
   orderNumber: varchar('order_number').notNull().unique(),
   shippingAddress: jsonb('shipping_address').notNull(),
-  status: pgEnum('OrderStatus')('status').notNull().default('pending'),
+  status: orderStatus('status').notNull().default('pending'),
   totalAmount: numeric('total_amount').notNull(),
   updatedAt: timestamp('updated_at').notNull().default(sql`now()`),
   userId: integer('user_id').notNull().references(() => users.id),

tests/assets/drizzle/schema.ts

@@ -13,7 +13,6 @@ export interface User {
   id: number;
   email: string;
   name: string | null;
-  profile: string | null;
   role: Role;
 }
 
@@ -21,8 +20,7 @@ export const user = pgTable('User', {
   id: integer('id').primaryKey().generatedAlwaysAsIdentity(),
   email: text('email').notNull().unique(),
   name: text('name'),
-  profile: text('profile'),
-  role: pgEnum('Role')('role').notNull().default('USER'),
+  role: role('role').notNull().default('USER'),
 });
 
 export type NewUser = typeof user.$inferInsert;
@@ -30,14 +28,12 @@ export type NewUser = typeof user.$inferInsert;
 export interface Profile {
   id: number;
   bio: string;
-  user: string;
   userId: number;
 }
 
 export const profile = pgTable('Profile', {
   id: integer('id').primaryKey().generatedAlwaysAsIdentity(),
   bio: text('bio').notNull(),
-  user: text('user').notNull(),
   userId: integer('userId').notNull().unique().references(() => user.id),
 });
 
@@ -45,7 +41,6 @@ export type NewProfile = typeof profile.$inferInsert;
 // Table: Post
 export interface Post {
   id: number;
-  author: string;
   authorId: number;
   createdAt: Date;
   published: boolean;
@@ -55,7 +50,6 @@ export interface Post {
 
 export const post = pgTable('Post', {
   id: integer('id').primaryKey().generatedAlwaysAsIdentity(),
-  author: text('author').notNull(),
   authorId: integer('authorId').notNull().references(() => user.id),
   createdAt: timestamp('createdAt').notNull().default(sql`now()`),
   published: boolean('published').notNull().default(false),