feat: expose decision items in refinement API

cmd/sdrd/decision_compact.go

@@ -0,0 +1,27 @@
+package main
+
+import "sdr-wideband-suite/internal/pipeline"
+
+type compactDecision struct {
+	ID        int64              `json:"id"`
+	Class     string             `json:"class,omitempty"`
+	Record    bool               `json:"record"`
+	Decode    bool               `json:"decode"`
+	Reason    string             `json:"reason,omitempty"`
+	Candidate pipeline.Candidate `json:"candidate"`
+}
+
+func compactDecisions(decisions []pipeline.SignalDecision) []compactDecision {
+	out := make([]compactDecision, 0, len(decisions))
+	for _, d := range decisions {
+		out = append(out, compactDecision{
+			ID:        d.Candidate.ID,
+			Class:     d.Class,
+			Record:    d.ShouldRecord,
+			Decode:    d.ShouldAutoDecode,
+			Reason:    d.Reason,
+			Candidate: d.Candidate,
+		})
+	}
+	return out
+}

cmd/sdrd/http_handlers.go

@@ -164,6 +164,7 @@ func registerAPIHandlers(mux *http.ServeMux, cfgPath string, cfgManager *runtime
 			"signals":            len(snap.refinement.Signals),
 			"decisions":          len(snap.refinement.Decisions),
 			"decision_summary":   summarizeDecisions(snap.refinement.Decisions),
+			"decision_items":     compactDecisions(snap.refinement.Decisions),
 			"surveillance_level": snap.surveillance.Level,
 			"refinement_level":   snap.refinementInput.Level,
 		}