Initial commit: Shop Database Flask Application

Flask backend with Vue 3 frontend for shop floor machine management.
Includes database schema export for MySQL shopdb_flask database.

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

.env.example

@@ -0,0 +1,15 @@
+# Flask configuration
+FLASK_APP=wsgi.py
+FLASK_ENV=development
+SECRET_KEY=change-this-to-a-secure-random-string
+
+# Database
+DATABASE_URL=mysql+pymysql://user:password@localhost:3306/shopdb_flask
+
+# JWT
+JWT_SECRET_KEY=change-this-to-another-secure-random-string
+JWT_ACCESS_TOKEN_EXPIRES=3600
+JWT_REFRESH_TOKEN_EXPIRES=2592000
+
+# Logging
+LOG_LEVEL=INFO