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>

drizzle/migrations/0000_charming_stature.sql

@@ -0,0 +1,57 @@
+CREATE TABLE `agents` (
+	`id` varchar(36) NOT NULL,
+	`pod_name` varchar(253) NOT NULL,
+	`k8s_namespace` varchar(63) DEFAULT 'agents',
+	`status` enum('idle','busy','error','offline') DEFAULT 'idle',
+	`current_task_id` varchar(36),
+	`tasks_completed` int DEFAULT 0,
+	`last_heartbeat` timestamp,
+	`created_at` timestamp DEFAULT (now()),
+	`updated_at` timestamp DEFAULT (now()) ON UPDATE CURRENT_TIMESTAMP,
+	CONSTRAINT `agents_id` PRIMARY KEY(`id`),
+	CONSTRAINT `agents_pod_name_unique` UNIQUE(`pod_name`)
+);
+--> statement-breakpoint
+CREATE TABLE `projects` (
+	`id` varchar(36) NOT NULL,
+	`name` varchar(255) NOT NULL,
+	`description` text,
+	`gitea_repo_id` int,
+	`gitea_repo_url` varchar(512),
+	`gitea_owner` varchar(100),
+	`gitea_repo_name` varchar(100),
+	`default_branch` varchar(100) DEFAULT 'main',
+	`k8s_namespace` varchar(63) NOT NULL,
+	`docker_image` varchar(512),
+	`env_vars` json,
+	`replicas` int DEFAULT 1,
+	`cpu_limit` varchar(20) DEFAULT '500m',
+	`memory_limit` varchar(20) DEFAULT '512Mi',
+	`status` enum('active','paused','archived') DEFAULT 'active',
+	`created_at` timestamp DEFAULT (now()),
+	`updated_at` timestamp DEFAULT (now()) ON UPDATE CURRENT_TIMESTAMP,
+	CONSTRAINT `projects_id` PRIMARY KEY(`id`),
+	CONSTRAINT `projects_k8s_namespace_unique` UNIQUE(`k8s_namespace`)
+);
+--> statement-breakpoint
+CREATE TABLE `tasks` (
+	`id` varchar(36) NOT NULL,
+	`project_id` varchar(36) NOT NULL,
+	`title` varchar(255) NOT NULL,
+	`description` text,
+	`priority` enum('low','medium','high','urgent') DEFAULT 'medium',
+	`state` enum('backlog','in_progress','needs_input','ready_to_test','approved','staging','production') DEFAULT 'backlog',
+	`assigned_agent_id` varchar(36),
+	`branch_name` varchar(255),
+	`pr_url` varchar(512),
+	`preview_url` varchar(512),
+	`created_at` timestamp DEFAULT (now()),
+	`updated_at` timestamp DEFAULT (now()) ON UPDATE CURRENT_TIMESTAMP,
+	CONSTRAINT `tasks_id` PRIMARY KEY(`id`)
+);
+--> statement-breakpoint
+ALTER TABLE `tasks` ADD CONSTRAINT `tasks_project_id_projects_id_fk` FOREIGN KEY (`project_id`) REFERENCES `projects`(`id`) ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE `tasks` ADD CONSTRAINT `tasks_assigned_agent_id_agents_id_fk` FOREIGN KEY (`assigned_agent_id`) REFERENCES `agents`(`id`) ON DELETE set null ON UPDATE no action;--> statement-breakpoint
+CREATE INDEX `idx_status` ON `agents` (`status`);--> statement-breakpoint
+CREATE INDEX `idx_status` ON `projects` (`status`);--> statement-breakpoint
+CREATE INDEX `idx_project_state` ON `tasks` (`project_id`,`state`);