Sync third-party and MCP marketplace plugins

Constraint: Public skills are published only by explicit administrator action unless they are tracked third-party market sources.
Confidence: high
Scope-risk: narrow
Directive: Keep private/internal skills out of the public marketplace and preserve normal incremental market Git history.
Tested: Marketplace validation passed.

config/external-sources.lock.json

@@ -130,10 +130,10 @@
       "id": "artemis-automation",
       "pluginName": "artemis-automation",
       "repo": "https://git.playones.com/chenmingxuan/Artemis-Eapil.git",
-      "ref": "v1.1.2",
+      "ref": "v1.2.0",
       "adapter": "claude-skill",
-      "commit": "0e13bb5c2927bb9e858ace4f43ab9f479ba55c61",
-      "syncedAt": "2026-09-24T09:40:56Z"
+      "commit": "84e183d28de0d759acbd1e61f78acec767739a4c",
+      "syncedAt": "2026-09-25T16:00:00Z"
     },
     {
       "id": "embedded-app-pc-debug",
@@ -168,8 +168,8 @@
       "repo": "https://github.com/vercel/next.js.git",
       "ref": "canary",
       "adapter": "skill-collection",
-      "commit": "30c08f56dc7c16473cfe252b3244375461fcc204",
-      "syncedAt": "2026-09-24T16:00:00Z"
+      "commit": "2b776990f06b38738d6d4971aa7e2e56b4d23b06",
+      "syncedAt": "2026-09-25T16:00:00Z"
     },
     {
       "id": "shuorenhua",