Use strict OpenRouter schema for analysis

src/jobs/analyze-voice-experience.ts

@@ -86,9 +86,40 @@ async function buildPlaceAnalysis(input: {
     },
     body: JSON.stringify({
       model: config.openRouterModel,
+      provider: { require_parameters: true },
       temperature: 0.1,
-      max_tokens: 900,
-      response_format: { type: 'json_object' },
+      max_tokens: 2000,
+      response_format: {
+        type: 'json_schema',
+        json_schema: {
+          name: 'place_analysis',
+          strict: true,
+          schema: {
+            type: 'object',
+            additionalProperties: false,
+            required: ['placeName', 'tags', 'signals', 'summary'],
+            properties: {
+              placeName: { type: 'string' },
+              tags: { type: 'array', items: { type: 'string' } },
+              signals: {
+                type: 'array',
+                items: {
+                  type: 'object',
+                  additionalProperties: false,
+                  required: ['axis', 'leaf', 'evidence', 'confidence'],
+                  properties: {
+                    axis: { type: 'string' },
+                    leaf: { type: 'string' },
+                    evidence: { type: 'string' },
+                    confidence: { type: 'number', minimum: 0, maximum: 1 },
+                  },
+                },
+              },
+              summary: { type: 'string' },
+            },
+          },
+        },
+      },
       messages: [
         {
           role: 'system',