Update README for CivitAI API key instructions, bump version to 0.7.1, and enhance error handling in API routes

README.md

@@ -25,6 +25,14 @@ A web-based management interface designed to help you organize and manage your l
 
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+## **⚠ Important Note**: To use the CivitAI download feature, you'll need to:
+
+1. Get your CivitAI API key from your profile settings
+2. Add it to the LoRA Manager settings page
+3. Save the settings
+
+---
+
 ## Key Features
 
 - 🚀 **High Performance**