fix: update concurrency settings and refine test matrix for Python versions to reduce CI time

Author: eleanorjboyd

.github/workflows/pr-check.yml

@@ -7,6 +7,10 @@ on:
       - main
       - release*
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.head_ref || github.ref }}
+  cancel-in-progress: true
+
 env:
   NODE_VERSION: '22.21.1'
 
@@ -174,8 +178,15 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ['3.10', '3.12', '3.14']
+        include:
+          - os: ubuntu-latest
+            python-version: '3.10'
+          - os: ubuntu-latest
+            python-version: '3.14'
+          - os: windows-latest
+            python-version: '3.12'
+          - os: macos-latest
+            python-version: '3.12'
 
     steps:
       - name: Checkout
@@ -267,8 +278,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ['3.10', '3.12', '3.14']
+        include:
+          - os: ubuntu-latest
+            python-version: '3.12'
+          - os: windows-latest
+            python-version: '3.12'
+          - os: macos-latest
+            python-version: '3.12'
 
     steps:
       - name: Checkout
@@ -360,8 +376,9 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ['3.10', '3.12', '3.14']
+        include:
+          - os: ubuntu-latest
+            python-version: '3.12'
 
     steps:
       - name: Checkout