fix: harden controlled Amap probe

supervisor/Dada.Supervisor.Tests/Program.cs

@@ -32,6 +32,7 @@ internal static class Program
         {
             var security = await TestCredentialBoundaryAsync();
             var supervisor = await TestSupervisorLifecycleAsync();
+            await TestAmapProbeSecurityAsync();
             TestSecureConfigurationPersistence();
             TestStructuredLogging();
             WriteEvidence(Environment.GetEnvironmentVariable("DADA_EVIDENCE_DIR_SEC"), security);
@@ -46,6 +47,20 @@ internal static class Program
         }
     }
 
+    private static async Task TestAmapProbeSecurityAsync()
+    {
+        using var handler = AmapProbe.CreateHandler();
+        False(handler.AllowAutoRedirect, "Amap probe redirects disabled");
+        Equal(1, handler.MaxConnectionsPerServer, "Amap probe per-server connection cap");
+        True(AmapProbe.IsAllowedEndpoint(new Uri("https://restapi.amap.com/v3/geocode/regeo")), "Amap fixed HTTPS endpoint accepted");
+        False(AmapProbe.IsAllowedEndpoint(new Uri("http://restapi.amap.com/v3/geocode/regeo")), "Amap HTTP endpoint rejected");
+        False(AmapProbe.IsAllowedEndpoint(new Uri("https://example.invalid/v3/geocode/regeo")), "Amap alternate host rejected");
+        using var oversized = new ByteArrayContent(new byte[AmapProbe.MaximumResponseBytes + 1]);
+        await ThrowsAsync<InvalidDataException>(
+            () => AmapProbe.ReadBoundedJsonAsync(oversized),
+            "Amap oversized response must be rejected before parsing");
+    }
+
     private static void TestStructuredLogging()
     {
         Equal(10 * 1024 * 1024L, StructuredJsonlLogger.SizeLimitBytes, "Supervisor log byte limit");