test: Add permission example test with running s3 file system (#1879)

<!-- .github/pull_request_template.md -->

## Description
Add test for S3 file system functioning with permissions example (covers
multi-user mode, permissions and multi tenancy use cases)

## Type of Change
<!-- Please check the relevant option -->
- [ ] Bug fix (non-breaking change that fixes an issue)
- [ ] New feature (non-breaking change that adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
- [ ] Code refactoring
- [ ] Performance improvement
- [ ] Other (please specify):

## Screenshots/Videos (if applicable)
<!-- Add screenshots or videos to help explain your changes -->

## Pre-submission Checklist
<!-- Please check all boxes that apply before submitting your PR -->
- [ ] **I have tested my changes thoroughly before submitting this PR**
- [ ] **This PR contains minimal changes necessary to address the
issue/feature**
- [ ] My code follows the project's coding standards and style
guidelines
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have added necessary documentation (if applicable)
- [ ] All new and existing tests pass
- [ ] I have searched existing PRs to ensure this change hasn't been
submitted already
- [ ] I have linked any relevant issues in the description
- [ ] My commits have clear and descriptive messages

## DCO Affirmation
I affirm that all code in every commit of this pull request conforms to
the terms of the Topoteretes Developer Certificate of Origin.


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Chores**
  * Renamed a CI test step to clarify its label in permissions testing.
* Added a new CI workflow job to validate permissions against S3-backed
storage, including a database service and an end-to-end example
execution to verify S3-specific environment and storage behavior.

<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.github/workflows/examples_tests.yml

@@ -257,7 +257,7 @@ jobs:
         with:
           python-version: '3.11.x'
 
-      - name: Run Memify Tests
+      - name: Run Permissions Example
         env:
           ENV: 'dev'
           OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
@@ -270,6 +270,65 @@ jobs:
           EMBEDDING_API_KEY: ${{ secrets.EMBEDDING_API_KEY }}
           EMBEDDING_API_VERSION: ${{ secrets.EMBEDDING_API_VERSION }}
         run: uv run python ./examples/python/permissions_example.py
+
+  test-s3-permissions-example: # Make sure permission and multi-user mode work with S3 file system
+    name: Run Permissions Example
+    runs-on: ubuntu-22.04
+    defaults:
+      run:
+        shell: bash
+    services:
+      postgres: # Using postgres to avoid storing and using SQLite from S3
+        image: pgvector/pgvector:pg17
+        env:
+          POSTGRES_USER: cognee
+          POSTGRES_PASSWORD: cognee
+          POSTGRES_DB: cognee_db
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 5432:5432
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Cognee Setup
+        uses: ./.github/actions/cognee_setup
+        with:
+          python-version: '3.11.x'
+          extra-dependencies: "postgres aws"
+
+      - name: Run S3 Permissions Example
+        env:
+          ENV: 'dev'
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+          LLM_MODEL: ${{ secrets.LLM_MODEL }}
+          LLM_ENDPOINT: ${{ secrets.LLM_ENDPOINT }}
+          LLM_API_KEY: ${{ secrets.LLM_API_KEY }}
+          LLM_API_VERSION: ${{ secrets.LLM_API_VERSION }}
+          EMBEDDING_MODEL: ${{ secrets.EMBEDDING_MODEL }}
+          EMBEDDING_ENDPOINT: ${{ secrets.EMBEDDING_ENDPOINT }}
+          EMBEDDING_API_KEY: ${{ secrets.EMBEDDING_API_KEY }}
+          EMBEDDING_API_VERSION: ${{ secrets.EMBEDDING_API_VERSION }}
+          STORAGE_BACKEND: 's3'
+          AWS_REGION: eu-west-1
+          AWS_ENDPOINT_URL: https://s3-eu-west-1.amazonaws.com
+          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_S3_DEV_USER_KEY_ID }}
+          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_S3_DEV_USER_SECRET_KEY }}
+          STORAGE_BUCKET_NAME: github-runner-cognee-tests
+          DATA_ROOT_DIRECTORY: "s3://github-runner-cognee-tests/cognee/data"
+          SYSTEM_ROOT_DIRECTORY: "s3://github-runner-cognee-tests/cognee/system"
+          DB_PROVIDER: 'postgres'
+          DB_NAME: 'cognee_db'
+          DB_HOST: '127.0.0.1'
+          DB_PORT: 5432
+          DB_USERNAME: cognee
+          DB_PASSWORD: cognee
+        run: uv run python ./examples/python/permissions_example.py
+
   test_docling_add:
     name: Run Add with Docling Test
     runs-on: macos-15