chore: update deprecated safety check to safety scan

- Updated .github/workflows/security.yml to use 'safety scan --output json --save-as'
- Updated .github/workflows/ci.yml to use 'safety scan'
- Resolves deprecation warnings about safety check command

The safety check command is deprecated and will be unsupported after June 2024.
The new scan command is more powerful and easier to use.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: codebydivine

.github/workflows/ci.yml

@@ -87,7 +87,7 @@ jobs:
         run: poetry run bandit -r src/ -f txt
 
       - name: Run safety dependency check
-        run: poetry run safety check
+        run: poetry run safety scan
 
   build:
     runs-on: ubuntu-latest

.github/workflows/security.yml

@@ -70,9 +70,9 @@ jobs:
         run: |
           poetry install --no-interaction --with dev --no-root
 
-      - name: Run Safety check
+      - name: Run Safety scan
         run: |
-          poetry run safety check --json --output safety-results.json || true
+          poetry run safety scan --output json --save-as safety-results.json || true
 
       - name: Run Bandit security scan
         run: |