feature: Ward Gateway Service (Local-First Clinical Path)

VigilCare.WardGateway/Configurations/CentralApiOptions.cs

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+public sealed class CentralApiOptions
+{
+    public const string Section = "CentralApi";
+    public string BaseUrl { get; init; } = "http://localhost:5080";
+}

VigilCare.WardGateway/Configurations/GatewayOptions.cs

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+public sealed class GatewayOptions
+{
+    public const string Section = "Gateway";
+    public Guid GatewayId { get; init; }
+    public Guid SiteId { get; init; }
+    public string Department { get; init; } = "ICU";
+    public int EncounterSyncIntervalMinutes { get; init; } = 5;
+    public int CentralReachabilityIntervalSeconds { get; init; } = 30;
+    public int HeartbeatIntervalSeconds { get; init; } = 60;
+    public int SyncBatchSize { get; init; } = 500;
+}

VigilCare.WardGateway/Configurations/RabbitMqOptions.cs

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+public sealed class RabbitMqOptions
+{
+    public const string Section = "RabbitMq";
+    public string Host { get; init; } = "localhost";
+    public int Port { get; init; } = 5674;
+    public string Username { get; init; } = "guest";
+    public string Password { get; init; } = "guest";
+    // Drives both the paging worker poll timeout and the DLQ x-message-ttl.
+    // In production: 300000 (5 min). In tests: 5000 (5 sec).
+    public int PagingAckTimeoutMs { get; init; } = 300000;
+}

VigilCare.WardGateway/Configurations/SuppressionOptions.cs

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+public class SuppressionOptions
+{
+    public const string SectionName = "AlertSuppression";
+
+    /// <summary>Default suppression window after acknowledgment (minutes).</summary>
+    public int DefaultWindowMinutes { get; set; } = 30;
+}