Retry OpenAI fallback with focused Aadhaar prompt

src/main/kotlin/com/android/trisolarisserver/component/OpenAIVisionClient.kt

@@ -29,6 +29,24 @@ class OpenAIVisionClient(
             return null
         }
 
+        val headers = HttpHeaders()
+        headers.contentType = MediaType.APPLICATION_JSON
+        headers.setBearerAuth(apiKey)
+        val first = call(imageUrl, "Read extremely carefully. Aadhaar number = 12 digits. Reply ONLY the 12 digits or NONE.", headers)
+        if (!first.isNullOrBlank() && !first.equals("NONE", ignoreCase = true)) {
+            return first
+        }
+        if (first != null) {
+            logger.info("OpenAI fallback returned NONE; retrying with focused prompt")
+        }
+        return call(
+            imageUrl,
+            "Focus on the 12-digit Aadhaar number printed on the card (often vertical on the left). Reply ONLY the 12 digits or NONE.",
+            headers
+        )
+    }
+
+    private fun call(imageUrl: String, prompt: String, headers: HttpHeaders): String? {
         val payload = mapOf(
             "model" to model,
             "instructions" to "Read extremely carefully. Reply ONLY the 12 digits or NONE. No extra text.",
@@ -41,7 +59,7 @@ class OpenAIVisionClient(
                     "content" to listOf(
                         mapOf(
                             "type" to "input_text",
-                            "text" to "Read extremely carefully. Aadhaar number = 12 digits. Reply ONLY the 12 digits or NONE."
+                            "text" to prompt
                         ),
                         mapOf(
                             "type" to "input_image",
@@ -52,10 +70,6 @@ class OpenAIVisionClient(
                 )
             )
         )
-
-        val headers = HttpHeaders()
-        headers.contentType = MediaType.APPLICATION_JSON
-        headers.setBearerAuth(apiKey)
         val entity = HttpEntity(payload, headers)
         return try {
             logger.info("OpenAI fallback request model={} url={}", model, baseUrl)