feat: add message rate limiting to prevent network flooding

.github/workflows/ci.yml

@@ -91,33 +91,6 @@ jobs:
         name: codecov-umbrella
         fail_ci_if_error: false
 
-  security:
-    name: Security Scan
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v4
-
-    - name: Set up Python
-      uses: actions/setup-python@v5
-      with:
-        python-version: "3.12"
-
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install -e ".[dev]"
-
-    - name: Run Bandit security scan
-      run: |
-        bandit -r meshcore_mqtt/ -f json -o bandit-report.json || true
-        bandit -r meshcore_mqtt/
-
-    # - name: Run Safety check
-    #   run: |
-    #     safety check --json --output safety-report.json || true
-    #     safety check
-
   build-test:
     name: Build Test
     runs-on: ubuntu-latest