sprints and audit work

src/Policy/__Libraries/StellaOps.Policy.Determinization/Models/SignalQueryStatus.cs

@@ -0,0 +1,26 @@
+namespace StellaOps.Policy.Determinization.Models;
+
+/// <summary>
+/// Query status for a signal.
+/// Distinguishes between "not yet queried", "queried with result", and "query failed".
+/// </summary>
+public enum SignalQueryStatus
+{
+    /// <summary>
+    /// Signal has not been queried yet.
+    /// Default state before any lookup attempt.
+    /// </summary>
+    NotQueried = 0,
+
+    /// <summary>
+    /// Signal query succeeded.
+    /// Value may be present or null (signal legitimately absent).
+    /// </summary>
+    Queried = 1,
+
+    /// <summary>
+    /// Signal query failed due to error (network, API timeout, etc.).
+    /// Value is null but reason is external failure, not absence.
+    /// </summary>
+    Failed = 2
+}