Initial commit: Backend with Bun.serve() + Drizzle ORM

- Bun 1.3.6 server setup
- MariaDB schema (projects, agents, tasks)
- Auto-migrations on startup
- WebSocket support
- Health check endpoint

Co-Authored-By: Claude Sonnet 4.5 (1M context) <noreply@anthropic.com>

src/db/schema.ts

@@ -0,0 +1,147 @@
+/**
+ * Database Schema - Drizzle ORM
+ * MariaDB 11.4 LTS
+ */
+
+import { relations } from 'drizzle-orm'
+import {
+  mysqlTable,
+  varchar,
+  text,
+  timestamp,
+  json,
+  int,
+  mysqlEnum,
+  boolean,
+  bigint,
+  index,
+} from 'drizzle-orm/mysql-core'
+
+// ============================================
+// PROJECTS TABLE
+// ============================================
+
+export const projects = mysqlTable('projects', {
+  id: varchar('id', { length: 36 }).primaryKey(),
+  name: varchar('name', { length: 255 }).notNull(),
+  description: text('description'),
+
+  // Gitea
+  giteaRepoId: int('gitea_repo_id'),
+  giteaRepoUrl: varchar('gitea_repo_url', { length: 512 }),
+  giteaOwner: varchar('gitea_owner', { length: 100 }),
+  giteaRepoName: varchar('gitea_repo_name', { length: 100 }),
+  defaultBranch: varchar('default_branch', { length: 100 }).default('main'),
+
+  // K8s
+  k8sNamespace: varchar('k8s_namespace', { length: 63 }).notNull().unique(),
+
+  // Infrastructure
+  dockerImage: varchar('docker_image', { length: 512 }),
+  envVars: json('env_vars').$type<Record<string, string>>(),
+  replicas: int('replicas').default(1),
+  cpuLimit: varchar('cpu_limit', { length: 20 }).default('500m'),
+  memoryLimit: varchar('memory_limit', { length: 20 }).default('512Mi'),
+
+  // Status
+  status: mysqlEnum('status', ['active', 'paused', 'archived']).default('active'),
+
+  // Timestamps
+  createdAt: timestamp('created_at').defaultNow(),
+  updatedAt: timestamp('updated_at').defaultNow().onUpdateNow(),
+}, (table) => ({
+  statusIdx: index('idx_status').on(table.status),
+}))
+
+// ============================================
+// AGENTS TABLE
+// ============================================
+
+export const agents = mysqlTable('agents', {
+  id: varchar('id', { length: 36 }).primaryKey(),
+
+  // K8s
+  podName: varchar('pod_name', { length: 253 }).notNull().unique(),
+  k8sNamespace: varchar('k8s_namespace', { length: 63 }).default('agents'),
+
+  // Status
+  status: mysqlEnum('status', ['idle', 'busy', 'error', 'offline']).default('idle'),
+  currentTaskId: varchar('current_task_id', { length: 36 }),
+
+  // Metrics
+  tasksCompleted: int('tasks_completed').default(0),
+  lastHeartbeat: timestamp('last_heartbeat'),
+
+  // Timestamps
+  createdAt: timestamp('created_at').defaultNow(),
+  updatedAt: timestamp('updated_at').defaultNow().onUpdateNow(),
+}, (table) => ({
+  statusIdx: index('idx_status').on(table.status),
+}))
+
+// ============================================
+// TASKS TABLE
+// ============================================
+
+export const tasks = mysqlTable('tasks', {
+  id: varchar('id', { length: 36 }).primaryKey(),
+  projectId: varchar('project_id', { length: 36 }).notNull().references(() => projects.id, { onDelete: 'cascade' }),
+
+  // Task info
+  title: varchar('title', { length: 255 }).notNull(),
+  description: text('description'),
+  priority: mysqlEnum('priority', ['low', 'medium', 'high', 'urgent']).default('medium'),
+
+  // State
+  state: mysqlEnum('state', [
+    'backlog',
+    'in_progress',
+    'needs_input',
+    'ready_to_test',
+    'approved',
+    'staging',
+    'production',
+  ]).default('backlog'),
+
+  // Assignment
+  assignedAgentId: varchar('assigned_agent_id', { length: 36 }).references(() => agents.id, { onDelete: 'set null' }),
+
+  // Git
+  branchName: varchar('branch_name', { length: 255 }),
+  prUrl: varchar('pr_url', { length: 512 }),
+
+  // Preview
+  previewUrl: varchar('preview_url', { length: 512 }),
+
+  // Timestamps
+  createdAt: timestamp('created_at').defaultNow(),
+  updatedAt: timestamp('updated_at').defaultNow().onUpdateNow(),
+}, (table) => ({
+  projectStateIdx: index('idx_project_state').on(table.projectId, table.state),
+}))
+
+// ============================================
+// RELATIONS
+// ============================================
+
+export const projectsRelations = relations(projects, ({ many }) => ({
+  tasks: many(tasks),
+}))
+
+export const tasksRelations = relations(tasks, ({ one }) => ({
+  project: one(projects, {
+    fields: [tasks.projectId],
+    references: [projects.id],
+  }),
+  assignedAgent: one(agents, {
+    fields: [tasks.assignedAgentId],
+    references: [agents.id],
+  }),
+}))
+
+export const agentsRelations = relations(agents, ({ one }) => ({
+  currentTask: one(tasks, {
+    fields: [agents.currentTaskId],
+    references: [tasks.id],
+  }),
+}))