chore(deps): bump actions/checkout from 4 to 6

Dependabot couldn't find the original pull request head commit, 8a178d8.

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
   lint-and-typecheck:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v4
         with:
           node-version: '20'
@@ -25,7 +25,7 @@ jobs:
   test-shared:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v4
         with:
           node-version: '20'
@@ -53,7 +53,7 @@ jobs:
       DATABASE_URL: postgresql://agent_identity:agent_identity@localhost:5433/agent_identity_test
       NODE_ENV: test
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v4
         with:
           node-version: '20'
@@ -74,7 +74,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [lint-and-typecheck, test-shared, test-api]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v4
         with:
           node-version: '20'
@@ -92,7 +92,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [lint-and-typecheck, test-shared, test-api]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v4
         with:
           node-version: '20'

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
       contents: write      # for creating GitHub Release
       id-token: write      # for npm provenance
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-node@v4
         with:

.github/workflows/security.yml

@@ -18,7 +18,7 @@ jobs:
     name: Dependency audit
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v4
         with:
           node-version: "20"
@@ -36,7 +36,7 @@ jobs:
     container:
       image: semgrep/semgrep
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Run Semgrep
         run: |
           semgrep scan \