Upgrade to Node 24 and update dependencies

- Bump @actions/cache to ^5.0.5, @actions/core to ^2.0.3,
  @actions/exec to ^2.0.0, @actions/io to ^2.0.0
- Bump dev deps: jest 29, prettier 3, ts-jest 29, typescript 5.9
- Update action runtime from node20 to node24
- Update CI workflows to use Node 24 and checkout@v5
- Remove jest-circus testRunner config (default in jest 29)
- Regenerate package-lock.json and rebuild dist

Author: danySam

.github/workflows/gcs-integration-test.yml

@@ -18,7 +18,7 @@ jobs:
       GCS_BUCKET: ${{ secrets.GCS_TEST_BUCKET }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Set up GCP credentials
       uses: google-github-actions/auth@v2
@@ -47,7 +47,7 @@ jobs:
       GCS_BUCKET: ${{ secrets.GCS_TEST_BUCKET }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Set up GCP credentials
       uses: google-github-actions/auth@v2
@@ -81,7 +81,7 @@ jobs:
       GCS_BUCKET: ${{ secrets.GCS_TEST_BUCKET }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Set up GCP credentials
       uses: google-github-actions/auth@v2
@@ -113,7 +113,7 @@ jobs:
       GCS_BUCKET: ${{ secrets.GCS_TEST_BUCKET }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Set up GCP credentials
       uses: google-github-actions/auth@v2
@@ -143,7 +143,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Generate fallback test files
       run: |
@@ -162,7 +162,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Restore with fallback (nonexistent bucket)
       id: restore-fallback-nonexist
@@ -185,7 +185,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Generate fallback test files (no bucket)
       run: |
@@ -204,7 +204,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Restore with fallback (no bucket)
       id: restore-fallback-nobucket