fix: stop logging Consul configuration values

src/BuildFlow.Host/Configuration/ConsulConfigurationProvider.cs

@@ -60,11 +60,6 @@ internal sealed class ConsulConfigurationProvider : ConfigurationProvider, IDisp
             _lastIndex = index;
             Data = dict;
             _logger.LogInformation("[Consul] 加载成功：{Count} 个 KV，LastIndex={Index}", dict.Count, index);
-            if (dict.Count > 0)
-            {
-                foreach (var k in dict.Keys.Take(3))
-                    _logger.LogDebug("[Consul] 示例 key: {Key} = {Val}", k, dict[k]?.ToString()?.Substring(0, Math.Min(20, dict[k]?.ToString()?.Length ?? 0)));
-            }
 
             if (_options.ReloadOnChange && _watchTimer == null)
             {

tests/BuildFlow.Architecture.Tests/ConfigurationSecurityTests.cs

@@ -0,0 +1,33 @@
+namespace BuildFlow.Architecture.Tests;
+
+using Xunit;
+
+/// <summary>
+/// 配置加载与日志输出的安全边界测试。
+/// </summary>
+public class ConfigurationSecurityTests
+{
+    [Fact]
+    public void ConsulProviderShouldNeverLogConfigurationValues()
+    {
+        var source = File.ReadAllText(Path.Combine(
+            FindRepoRoot().FullName,
+            "src", "BuildFlow.Host", "Configuration", "ConsulConfigurationProvider.cs"));
+
+        Assert.DoesNotContain("{Val}", source);
+        Assert.DoesNotContain("dict[k]", source);
+        Assert.DoesNotContain("示例 key:", source);
+    }
+
+    private static DirectoryInfo FindRepoRoot()
+    {
+        var current = new DirectoryInfo(AppContext.BaseDirectory);
+        while (current is not null)
+        {
+            if (File.Exists(Path.Combine(current.FullName, "BuildFlow.slnx"))) return current;
+            current = current.Parent;
+        }
+
+        throw new InvalidOperationException("无法定位 BuildFlow.slnx，无法验证配置日志安全边界。");
+    }
+}