libschedutil: use f58 for jobids in log messages

Problem: libschedutil logs jobids in their decimal encoding, but
jobids in this form aren't easily identifiable as jobids at first
glance and take up more space in most cases.

Update libschedutil to log jobids as f58.

Author: grondo

src/common/libschedutil/hello.c

@@ -14,6 +14,7 @@
 #include <flux/core.h>
 #include <jansson.h>
 
+#include "src/common/libjob/idf58.h"
 #include "schedutil_private.h"
 #include "init.h"
 #include "hello.h"
@@ -25,14 +26,14 @@ static void raise_exception (flux_t *h, flux_jobid_t id, const char *note)
 
     flux_log (h,
               LOG_INFO,
-              "raising fatal exception on running job id=%ju",
-              (uintmax_t)id);
+              "raising fatal exception on running job id=%s",
+              idf58 (id));
 
     if (!(f = flux_job_raise (h, id, "scheduler-restart", 0, note))
         || flux_future_get (f, NULL) < 0) {
         flux_log_error (h,
-                        "error raising fatal exception on %ju: %s",
-                        (uintmax_t)id,
+                        "error raising fatal exception on %s: %s",
+                        idf58 (id),
                         future_strerror (f, errno));
     }
     flux_future_destroy (f);
@@ -64,8 +65,8 @@ static int schedutil_hello_job (schedutil_t *util,
     flux_future_destroy (f);
     return 0;
 error:
-    flux_log_error (util->h, "hello: error loading R for id=%ju",
-                    (uintmax_t)id);
+    flux_log_error (util->h, "hello: error loading R for id=%s",
+                    idf58 (id));
     flux_future_destroy (f);
     return -1;
 }