chore: bump all packages to v0.3.1 for npm publish

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: Dchuong03

package.json

@@ -1,6 +1,6 @@
 {
   "name": "sidstack",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "private": true,
   "type": "module",
   "description": "SidStack - Lightweight AI Agent Orchestration Platform",

packages/api-server/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@sidstack/api-server",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "description": "REST API server for SidStack Web UI",
   "license": "MIT",
   "publishConfig": {