Add EU AI Act Article 5 template to policy templates

Adds the EU AI Act Article 5 - Prohibited Practices template to the policy templates JSON that the UI reads from.

The template uses the eu_ai_act_article5_prohibited_practices category that was added in PR #21342. Blocks prompts requesting:
- Social scoring systems
- Emotion recognition in workplace/education
- Biometric categorization for sensitive attributes
- Predictive profiling and manipulation

Shows up in the UI under EU region filter with High complexity.

policy_templates.json

@@ -768,5 +768,46 @@
       ],
       "guardrails_remove": []
     }
+  },
+  {
+    "id": "eu-ai-act-article5",
+    "title": "EU AI Act Article 5 — Prohibited Practices",
+    "description": "EU AI Act Article 5 compliance for prohibited AI practices. Blocks requests related to social scoring, emotion recognition in workplace/education, biometric categorization, predictive profiling, manipulation, and vulnerability exploitation. Uses conditional matching (identifier word + context word).",
+    "region": "EU",
+    "icon": "ShieldExclamationIcon",
+    "iconColor": "text-red-500",
+    "iconBg": "bg-red-50",
+    "guardrails": [
+      "eu-ai-act-prohibited-practices"
+    ],
+    "complexity": "High",
+    "guardrailDefinitions": [
+      {
+        "guardrail_name": "eu-ai-act-prohibited-practices",
+        "litellm_params": {
+          "guardrail": "litellm_content_filter",
+          "mode": "pre_call",
+          "categories": [
+            {
+              "category": "eu_ai_act_article5_prohibited_practices",
+              "enabled": true,
+              "action": "BLOCK",
+              "severity_threshold": "medium"
+            }
+          ]
+        },
+        "guardrail_info": {
+          "description": "Blocks EU AI Act Article 5 prohibited practices: social scoring systems, emotion recognition in workplace/education, biometric categorization for sensitive attributes, predictive profiling, manipulation, and vulnerability exploitation"
+        }
+      }
+    ],
+    "templateData": {
+      "policy_name": "eu-ai-act-article5",
+      "description": "EU AI Act Article 5 compliance policy for prohibited AI practices. Blocks social scoring, emotion recognition in workplace/education, biometric categorization, predictive profiling, manipulation, and vulnerability exploitation.",
+      "guardrails_add": [
+        "eu-ai-act-prohibited-practices"
+      ],
+      "guardrails_remove": []
+    }
   }
 ]