chore: bump plugin to v0.7.0

New since v0.6.0:
- Monitor subsystem (background ecosystem watcher via MCP session)
- agentic_watch tool (progress notifications)
- Auto PR creation on agent completion
- Sandbox enforcement (3-layer)
- Completion events (events.jsonl)
- status://agents MCP resource
- go-process init for dispatch

Co-Authored-By: Virgil <virgil@lethean.io>

.claude-plugin/marketplace.json

@@ -9,8 +9,8 @@
     {
       "name": "core",
       "source": "./claude/core",
-      "description": "Core agent platform — dispatch, status, review, verify, sweep, recall, scan, messaging, conventions enforcement",
-      "version": "0.6.0"
+      "description": "Core agent platform — dispatch, watch, monitor, status, review, scan, messaging, PR automation, sandboxed agents",
+      "version": "0.7.0"
     },
     {
       "name": "core-php",

claude/core/.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "core",
-  "description": "Core agent platform — dispatch, status, review, verify, sweep, recall, scan, messaging, conventions enforcement",
-  "version": "0.6.0",
+  "description": "Core agent platform — dispatch, watch, monitor, status, review, scan, messaging, PR automation, sandboxed agents",
+  "version": "0.7.0",
   "author": {
     "name": "Lethean",
     "email": "hello@host.uk.com"