feat: add Dockerfiles and MySQL TypeORM wiring for center/guild backends

Fabric.Backend.Center/src/app.module.ts

@@ -1,10 +1,12 @@
 import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { buildTypeOrmConfig } from './database.config';
 import { HealthController } from './common/health.controller';
 import { AuthModule } from './auth/auth.module';
 import { NodesModule } from './nodes/nodes.module';
 
 @Module({
-  imports: [AuthModule, NodesModule],
+  imports: [TypeOrmModule.forRoot(buildTypeOrmConfig()), AuthModule, NodesModule],
   controllers: [HealthController],
 })
 export class AppModule {}

Fabric.Backend.Center/src/database.config.ts

@@ -0,0 +1,15 @@
+import { TypeOrmModuleOptions } from '@nestjs/typeorm';
+import { User } from './entities/user.entity';
+import { GuildNode } from './entities/guild-node.entity';
+
+export const buildTypeOrmConfig = (): TypeOrmModuleOptions => ({
+  type: 'mysql',
+  host: process.env.DB_HOST ?? 'mysql-center',
+  port: Number(process.env.DB_PORT ?? 3306),
+  username: process.env.DB_USER ?? 'fabric',
+  password: process.env.DB_PASSWORD ?? 'fabric',
+  database: process.env.DB_NAME ?? 'fabric_center',
+  entities: [User, GuildNode],
+  synchronize: (process.env.DB_SYNC ?? 'true') === 'true',
+  logging: (process.env.DB_LOGGING ?? 'false') === 'true',
+});

Fabric.Backend.Center/src/entities/guild-node.entity.ts

@@ -0,0 +1,22 @@
+import { Column, CreateDateColumn, Entity, PrimaryGeneratedColumn } from 'typeorm';
+
+@Entity('guild_nodes')
+export class GuildNode {
+  @PrimaryGeneratedColumn('uuid')
+  id!: string;
+
+  @Column({ unique: true })
+  nodeId!: string;
+
+  @Column()
+  name!: string;
+
+  @Column()
+  endpoint!: string;
+
+  @Column({ default: 'active' })
+  status!: string;
+
+  @CreateDateColumn()
+  createdAt!: Date;
+}

Fabric.Backend.Center/src/entities/user.entity.ts

@@ -0,0 +1,16 @@
+import { Column, CreateDateColumn, Entity, PrimaryGeneratedColumn } from 'typeorm';
+
+@Entity('users')
+export class User {
+  @PrimaryGeneratedColumn('uuid')
+  id!: string;
+
+  @Column({ unique: true })
+  email!: string;
+
+  @Column()
+  passwordHash!: string;
+
+  @CreateDateColumn()
+  createdAt!: Date;
+}