[2.33.1] Add status frontmatter to plan templates

- Plan templates now include `status: active` in YAML frontmatter
- /workflows:work updates plan status to `completed` after shipping
- Agents can grep frontmatter to distinguish current vs historical plans

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/compound-engineering/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "compound-engineering",
-  "version": "2.33.0",
+  "version": "2.33.1",
   "description": "AI-powered development tools. 29 agents, 22 commands, 19 skills, 1 MCP server for code review, research, design, and workflow automation.",
   "author": {
     "name": "Kieran Klaassen",