ci: reduce workflow overhead

.asf.yaml

@@ -73,7 +73,7 @@ github:
           parameters:
             check_response_timeout_minutes: 90
             grouping_strategy: ALLGREEN
-            max_entries_to_build: 1
+            max_entries_to_build: 2
             max_entries_to_merge: 1
             merge_method: SQUASH
             min_entries_to_merge: 1

.github/workflows/asf-allowlist-check.yml

@@ -27,12 +27,16 @@ on:
   pull_request:
   merge_group:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name }}
+  cancel-in-progress: true
+
 permissions:
   contents: read
 
 jobs:
   asf-allowlist-check:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-slim
     steps:
     - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       with:

.github/workflows/codeql.yml

@@ -27,6 +27,10 @@ on:
   schedule:
     - cron: '16 4 * * 1'
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name }}
+  cancel-in-progress: true
+
 permissions:
   contents: read
 

.github/workflows/release_python_nightly.yml

@@ -28,7 +28,7 @@ permissions:
 jobs:
   set-version:
     if: github.repository == 'apache/iceberg-rust' || github.event_name == 'workflow_dispatch' # Run on schedule for apache repo, or on manual dispatch from any repo
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-slim
     outputs:
       timestamp: ${{ steps.set-ts.outputs.TIMESTAMP }}
     steps:

.github/workflows/stale.yml

@@ -30,7 +30,7 @@ permissions:
 jobs:
   stale:
     if: github.repository_owner == 'apache'
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-slim
     steps:
       - uses: actions/stale@4391f3da665fdf50b6810c1a66712fb9ba21aa93 # v11.0.0
         with:

.github/workflows/zizmor.yml

@@ -23,6 +23,10 @@ on:
   pull_request:
   merge_group:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name }}
+  cancel-in-progress: true
+
 permissions: {}
 
 jobs: