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

@@ -24,8 +24,8 @@
       "repo": "https://github.com/Yeachan-Heo/oh-my-codex.git",
       "ref": "main",
       "adapter": "codex-plugin",
-      "commit": "b48df502d566430be768d3c60f2f51fa91630396",
-      "syncedAt": "2026-09-01T16:00:00Z"
+      "commit": "2da36489cfa07ef1df802f01865e7d959d36f236",
+      "syncedAt": "2026-09-03T09:20:38Z"
     },
     {
       "id": "ui-ux-pro-max",
@@ -33,8 +33,8 @@
       "repo": "https://github.com/nextlevelbuilder/ui-ux-pro-max-skill.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "58c220ff9d02be80523b06c03471925c52e8ab5d",
-      "syncedAt": "2026-09-02T16:00:01Z"
+      "commit": "91c193ac059b487d13ce535c7015b021eb71c841",
+      "syncedAt": "2026-09-03T09:20:38Z"
     },
     {
       "id": "caveman",
@@ -96,8 +96,8 @@
       "repo": "https://github.com/hugohe3/ppt-master.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "06abd6ed41a6d066f1be035852432f127687de0e",
-      "syncedAt": "2026-09-03T02:28:39Z"
+      "commit": "6a8e91e244c987e49fbc4744be3b6d235f4f1e77",
+      "syncedAt": "2026-09-03T09:20:38Z"
     },
     {
       "id": "grill-me",
@@ -114,8 +114,8 @@
       "repo": "https://git.playones.com/huzhifa/skill-git-push.git",
       "ref": "main",
       "adapter": "codex-plugin",
-      "commit": "72c856975eaa340b023eb5393d958ca0bff1f59c",
-      "syncedAt": "2026-09-02T10:37:18Z"
+      "commit": "3a0b288dfa4df0657dc63c0fd424069432016595",
+      "syncedAt": "2026-09-03T09:20:38Z"
     },
     {
       "id": "etunel-role-collaboration",
@@ -132,8 +132,8 @@
       "repo": "https://github.com/vercel/next.js.git",
       "ref": "canary",
       "adapter": "skill-collection",
-      "commit": "69ec884e44d1050013724facfe452248e5b9de55",
-      "syncedAt": "2026-09-03T02:28:39Z"
+      "commit": "fb4c498852c0884cbc356cac4c2a6efec98da50f",
+      "syncedAt": "2026-09-03T09:20:38Z"
     },
     {
       "id": "shuorenhua",