alot more changes

internal/collector/issue_traces.go

@@ -175,6 +175,28 @@ func (c *Collector) HandleIssueTraces(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+// HandleIssueSources returns all distinct source IPs recorded for an issue.
+// This is separate from /traces because trace pages intentionally bound the
+// number of raw samples returned per trace.
+func (c *Collector) HandleIssueSources(w http.ResponseWriter, r *http.Request) {
+	id := r.PathValue("id")
+	if c.occStore == nil {
+		http.Error(w, "issue source history requires ClickHouse storage", http.StatusNotImplemented)
+		return
+	}
+	sources, err := c.occStore.IssueSources(r.Context(), id)
+	if err != nil {
+		log.Printf("failed to load issue sources %s: %v", id, err)
+		http.Error(w, "failed to load issue sources", http.StatusInternalServerError)
+		return
+	}
+	if sources == nil {
+		sources = []storage.IssueSource{}
+	}
+	w.Header().Set("Content-Type", "application/json")
+	_ = json.NewEncoder(w).Encode(sources)
+}
+
 // groupInMemory builds the same shape from the tracker's bounded samples,
 // newest trace first.
 func groupInMemory(samples []issues.Sample) ([]issueTraceJSON, []issues.Sample) {