feat: complete IM P0 and P1 reliability work

server/db/mysql/infrastructure_schema.go

@@ -0,0 +1,39 @@
+//go:build mysql
+// +build mysql
+
+package mysql
+
+func ensureIMHTTPInfrastructureTables(exec sqlExecutor) error {
+	statements := []string{
+		`CREATE TABLE IF NOT EXISTS im_http_idempotency (
+			id BIGINT NOT NULL AUTO_INCREMENT, user_id BIGINT NOT NULL,
+			method VARCHAR(8) NOT NULL, route VARCHAR(512) NOT NULL,
+			idempotency_key VARCHAR(128) NOT NULL, body_hash CHAR(64) NOT NULL,
+			state VARCHAR(16) NOT NULL DEFAULT 'processing', response_status INT NOT NULL DEFAULT 0,
+			response_body MEDIUMBLOB, expires_at DATETIME(3) NOT NULL,
+			created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+			updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
+			PRIMARY KEY(id),
+			UNIQUE INDEX uk_im_http_idempotency_scope(user_id, method, route, idempotency_key),
+			INDEX idx_im_http_idempotency_expiry(expires_at)
+		) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci`,
+		`CREATE TABLE IF NOT EXISTS im_business_events_outbox (
+			id BIGINT NOT NULL AUTO_INCREMENT, event_id VARCHAR(64) NOT NULL,
+			target_type VARCHAR(16) NOT NULL, target VARCHAR(128) NOT NULL,
+			actor_user_id BIGINT NOT NULL DEFAULT 0, event_type VARCHAR(64) NOT NULL,
+			payload JSON, status VARCHAR(16) NOT NULL DEFAULT 'pending', attempts INT NOT NULL DEFAULT 0,
+			next_retry_at DATETIME(3), delivered_at DATETIME(3),
+			created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+			updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
+			PRIMARY KEY(id), UNIQUE INDEX uk_im_business_events_outbox_event(event_id),
+			INDEX idx_im_business_events_outbox_pending(status, next_retry_at, id),
+			INDEX idx_im_business_events_outbox_target(target_type, target, id)
+		) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci`,
+	}
+	for _, statement := range statements {
+		if _, err := exec.Exec(statement); err != nil {
+			return err
+		}
+	}
+	return nil
+}