feat: Implement mobile application and lead processing utilities.

scripts/preview_duesseldorf_pdf.py

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+import pypdf
+import re
+
+pdf_path = 'cologne_duesseldorf_data/duesseldorf_innungen.pdf'
+
+try:
+    reader = pypdf.PdfReader(pdf_path)
+    text = ""
+    for page in reader.pages:
+        text += page.extract_text() + "\n"
+    
+    print(f"Extracted {len(text)} characters.")
+    print("--- PREVIEW ---")
+    print(text[:1000])
+    print("--- END PREVIEW ---")
+    
+    # Simple regex check for emails
+    emails = re.findall(r'[\w\.-]+@[\w\.-]+', text)
+    print(f"Found {len(emails)} potential email addresses.")
+    
+except Exception as e:
+    print(f"Error reading PDF: {e}")