Fix wording, docs and style inconsistencies per audit of 0139564

internal/hookcmd/hookcmd.go

@@ -31,7 +31,7 @@ func Handler(hooks map[string]Func) http.HandlerFunc {
 		}
 		out, err := fn(r.Context(), body)
 		if err != nil {
-			slog.Error("hook failed", "event", event, "err", err)
+			slog.Error("run hook", "event", event, "err", err)
 			out = map[string]any{}
 		}
 		w.Header().Set("Content-Type", "application/json")