Zip Integration: Easier Configuration and No Longer Gets Stuck 🔌

Three improvements to the Zip connect flow make it easier to configure and more informative.

• Multiple categories: the Category field is now a tag input — type a value, press Enter, and add as many as you need. Commas inside a value are preserved safely.
• Count on success: the test result now shows how many matching requests were found (e.g. '3 of the 360 most recent Zip requests match this category') instead of just a green tick.
• Misses only warn, no longer block: if a valid category returns no results during the test, Connect is no longer disabled — you get a warning with context, and the full sync will find what the test sample missed.