Add waiting system application files

- Add main application files (main.py, models.py, schemas.py, etc.)
- Add routers for all features (waiting, attendance, members, etc.)
- Add HTML templates for admin and user interfaces
- Add migration scripts and utility files
- Add Docker configuration
- Add documentation files
- Add .gitignore to exclude database and cache files

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

migrate_name_display_length.py

@@ -0,0 +1,19 @@
+"""Add name_display_length column to store_settings table"""
+
+from database import SessionLocal, engine
+from sqlalchemy import text
+
+db = SessionLocal()
+try:
+    # Add the column if it doesn't exist
+    db.execute(text("ALTER TABLE store_settings ADD COLUMN name_display_length INTEGER DEFAULT 0"))
+    db.commit()
+    print("✅ Successfully added name_display_length column")
+except Exception as e:
+    if "duplicate column name" in str(e).lower() or "already exists" in str(e).lower():
+        print("ℹ️ Column already exists, skipping...")
+    else:
+        print(f"❌ Error: {e}")
+    db.rollback()
+finally:
+    db.close()