Fix security vulnerabilities in dependencies

- Upgrade cryptography from 44.0.0 to 44.0.1 (CVE-2024-12797)
- Upgrade pypdf from 5.1.0 to 6.0.0 (CVE-2025-55197)
- npm packages already updated (multer to 2.0.2)

Fixes Dependabot alerts #41, #40

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

Co-Authored-By: Claude <noreply@anthropic.com>

Author: wesellis

pdf-processing/requirements.txt

@@ -1,5 +1,5 @@
 # PDF Processing Dependencies
-pypdf==5.1.0
+pypdf==6.0.0
 pymupdf==1.24.0
 pdf2image==1.17.0
 pytesseract==0.3.13

python-automation/requirements.txt

@@ -12,7 +12,7 @@ numpy==1.25.2
 openpyxl==3.1.2
 
 # Enterprise security and encryption
-cryptography==44.0.0
+cryptography==44.0.1
 pyjwt[crypto]==2.8.0
 azure-keyvault-secrets==4.7.0
 azure-identity==1.20.0