compose and authority fixes. finish sprints.

src/BinaryIndex/__Libraries/StellaOps.BinaryIndex.DeltaSig/DeltaSignatureGenerator.cs

@@ -92,11 +92,16 @@ public sealed class DeltaSignatureGenerator : IDeltaSignatureGenerator
         // Get all symbols
         var symbols = plugin.GetSymbols(binary).ToDictionary(s => s.Name);
 
+        // Generate signatures for each target symbol. Empty target list means "all symbols".
+        var targetSymbols = request.TargetSymbols.Count == 0
+            ? symbols.Keys.OrderBy(v => v, StringComparer.Ordinal).ToArray()
+            : request.TargetSymbols;
+
         // Generate signatures for each target symbol
         var symbolSignatures = new List<SymbolSignature>();
         var appliedSteps = new List<string>();
 
-        foreach (var symbolName in request.TargetSymbols)
+        foreach (var symbolName in targetSymbols)
         {
             ct.ThrowIfCancellationRequested();
 
@@ -486,3 +491,4 @@ public sealed class DeltaSignatureGenerator : IDeltaSignatureGenerator
         };
     }
 }
+