chore: initial import

tech/migrations/000002_add_notification_logs.up.sql

@@ -0,0 +1,17 @@
+-- 通知日志表
+CREATE TABLE IF NOT EXISTS ai_ops_notification_logs (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    event_id UUID NOT NULL REFERENCES ai_ops_alerts(id) ON DELETE CASCADE,
+    channel_id UUID NOT NULL REFERENCES ai_ops_channels(id) ON DELETE CASCADE,
+    channel_type VARCHAR(32) NOT NULL,
+    status VARCHAR(16) NOT NULL DEFAULT 'pending'
+        CHECK (status IN ('pending', 'sent', 'failed', 'retrying')),
+    retry_count INT NOT NULL DEFAULT 0,
+    error_message TEXT NULL,
+    sent_at TIMESTAMPTZ NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_notification_logs_event ON ai_ops_notification_logs(event_id);
+CREATE INDEX IF NOT EXISTS idx_notification_logs_status ON ai_ops_notification_logs(status);
+CREATE INDEX IF NOT EXISTS idx_notification_logs_created ON ai_ops_notification_logs(created_at DESC);