fix: resolve double URL-encoding and add singular NIFTY FIN SERVICE mapping alias

Author: SagaRoy12

am-market-data/market-data-provider/src/main/java/com/am/marketdata/provider/upstox/UpstoxIndexIdentifier.java

@@ -58,6 +58,7 @@ public void initialize() {
                 // Add custom aliases for UI symbols that differ from Upstox instrument keys
                 indexKeyMap.put("NIFTY PHARMACEUTICALS", "NSE_INDEX|Nifty Pharma");
                 indexKeyMap.put("NIFTY FIN SERVICES", "NSE_INDEX|Nifty Fin Service");
+                indexKeyMap.put("NIFTY FIN SERVICE", "NSE_INDEX|Nifty Fin Service");
                 indexKeyMap.put("NIFTY CONSR DURABLE", "NSE_INDEX|NIFTY CONSR DURBL");
 
                 log.info("Loaded {} Upstox Index Identifiers", indexKeyMap.size());

am-market-data/market-data-provider/src/main/java/com/am/marketdata/provider/upstox/UpstoxSdkService.java

@@ -344,7 +344,9 @@ private com.am.marketdata.provider.upstox.model.HistoricalDataResponse fetchHist
             String normalizedKey, String unit, Integer interval, String toDate, String fromDate, boolean isQueryingToday) {
         try {
             String token = getDynamicAccessToken();
-            String encodedKey = java.net.URLEncoder.encode(normalizedKey, java.nio.charset.StandardCharsets.UTF_8.toString())
+            // Safeguard against double-encoding (decodes the key to plain text first, then encodes it cleanly exactly once)
+            String decodedKey = java.net.URLDecoder.decode(normalizedKey, java.nio.charset.StandardCharsets.UTF_8.toString());
+            String encodedKey = java.net.URLEncoder.encode(decodedKey, java.nio.charset.StandardCharsets.UTF_8.toString())
                     .replace("+", "%20");
 
             String urlStr;