ci: 加 paths-ignore + landing concurrency cancel (省 GH Actions minutes)

對應 leo 2026-05-16 Actions 配額用爆 → 全面瘦身 CI trigger。

deploy.yml (Workers):
  既有：worker-level git diff filter（只 deploy 改到的 worker）✅
  新增：workflow-level paths-ignore — doc-only commit 完全不啟動 workflow
        排除：**.md / AGENTS.md / .agents/** / docs/** / registry/examples/** /
              registry/skills/** / .gitignore / LICENSE
  之前每個 doc push 都觸發 discover job 吃 ~1 min。
  本輪 LI 開發 ~10 doc-only commit = 省 ~10 min

deploy-landing.yml (Pages):
  既有：paths filter ('landing/**') ✅
  新增：concurrency cancel-in-progress (原 false → true)
  landing build ~3 min 是大頭，連續 push 取消舊 build 省最多

.github/workflows/deploy-landing.yml

@@ -15,7 +15,8 @@ on:
 
 concurrency:
   group: deploy-landing-${{ github.ref }}
-  cancel-in-progress: false
+  # 連續 push landing 改動時，舊 build 自動 cancel（landing build ~3 min 是大頭，省 minutes 關鍵）
+  cancel-in-progress: true
 
 jobs:
   deploy:

.github/workflows/deploy.yml

@@ -7,7 +7,18 @@ name: Deploy Workers
 on:
   push:
     branches: [main]
-    # 不設 paths:由 discover job 用 git diff 過濾,push 都會觸發讓 workflow 判斷
+    # 2026-05-16 leo Actions 配額用爆後加 paths-ignore：純文件 commit 完全不觸發 workflow
+    # （之前每個 push 都會跑 discover job 吃 ~1 min，doc-only commit 多時積很多）
+    # worker code 變動仍由 discover job 用 git diff 過濾
+    paths-ignore:
+      - '**/*.md'
+      - 'AGENTS.md'
+      - '.agents/**'
+      - 'docs/**'
+      - 'registry/examples/**'
+      - 'registry/skills/**'
+      - '.gitignore'
+      - 'LICENSE'
   workflow_dispatch:
     inputs:
       force_all: