fix: use standard Spice Cloud endpoints instead of region-specific URLs

Updated FlightQueryTest and ParameterizedQueryTest to use the standard
Spice Cloud endpoints (data.spiceai.io and flight.spiceai.io) instead
of region-specific URLs (us-east-1-prod-aws-* and us-west-2-prod-aws-*)
which were causing 'failed to get spice client' errors.

Author: lukekim

src/test/java/ai/spice/FlightQueryTest.java

@@ -45,8 +45,8 @@ public void testQuerySpiceCloudPlatform() throws ExecutionException, Interrupted
         try {
             SpiceClient spiceClient = SpiceClient.builder()
                     .withApiKey(apiKey) // https://spice.ai/spiceai/quickstart
-                    .withHttpAddress(new URI("https://us-east-1-prod-aws-data.spiceai.io"))
-                    .withFlightAddress(new URI("https://us-east-1-prod-aws-flight.spiceai.io:443"))
+                    .withHttpAddress(new URI("https://data.spiceai.io"))
+                    .withFlightAddress(new URI("https://flight.spiceai.io:443"))
                     .build();
 
             String sql = "SELECT tpep_pickup_datetime, total_amount, passenger_count from taxi_trips limit 10;";

src/test/java/ai/spice/ParameterizedQueryTest.java

@@ -54,8 +54,8 @@ public void testParameterizedQuerySpiceCloud() throws Exception {
 
         try (SpiceClient spiceClient = SpiceClient.builder()
                 .withApiKey(apiKey)
-                .withHttpAddress(new URI("https://us-west-2-prod-aws-data.spiceai.io"))
-                .withFlightAddress(new URI("https://us-west-2-prod-aws-flight.spiceai.io:443"))
+                .withHttpAddress(new URI("https://data.spiceai.io"))
+                .withFlightAddress(new URI("https://flight.spiceai.io:443"))
                 .build()) {
 
             // Test with float parameter - taxi_trips available in Spice Cloud