fix(scheduler): clock/resval/jobid-format fixes plus REPL live-operator gaps (task 12.5)

Bugs fixed, discovered across a day of live-operator testing against a
real deployed cluster:

- bug-1584: clock anchors never initialized to real wall-clock values,
  timestamps showed system uptime instead of Unix epoch.
- bug-1585: heap-use-after-free in the normal-mode driver's periodic
  resval update path -- core_events.c's RESVALS_FULL/_DELTA handlers do a
  shallow zarray_put() of the wire-decoded xce_val_t*, but driver.c's
  release_translated_payload() unconditionally freed the same decoded
  array right after, so the next periodic report for the same
  worker+resource triggered a UAF read via kill_sched_resval(). New
  regression test: test_resval_ownership.c.
- bug-1587/1588/1591: raw-ns/raw-uint64 jobid/timestamp prints across the
  REPL/SIM family converted to the same human-readable formatting already
  used elsewhere (fmt_jobid(), timestamp formatting).
- bug-1590: repl_info.c's XCE_VAL_NUMERIC checks corrected to
  Value_u_fvalue, fixing `info worker`/`info resource` falling back to
  0.00 for real numeric resvals.

task 12.5 (Req 5.22 amendment) -- five REPL gaps surfaced by a live
operator session, each with its own bug id:
- bug-1594: `continue`/`step` reaching EOF with no breakpoint hit now
  re-enters the REPL via xce_repl_on_replay_complete() instead of exiting
  the process; step/continue issued after replay is already complete
  re-prompt instead of silently exiting.
- bug-1595: `step`/`continue` now echo each input event (not just
  decisions) via repl_print_event_summary(), in real event/decision
  order.
- bug-1593: `info resource <name>|all` now reports resource definition
  metadata restricted to XCE_RESF_GLOBAL/XCE_RESF_SHARED resources, read
  from core->sharedInst, instead of aggregating host-based resources
  across every worker.
- bug-1596: repl_split_tokens() strips one matching pair of surrounding
  quote characters from each token.

See requirements.md's Req 5 AC 22 "Amendment (2026-08-19)" for the full
rationale on each of the five task 12.5 gaps.

Full scheduler suite green (41/42; the one remaining failure,
test_recordstart_symlink_escape_replies_error, is the pre-existing
unrelated bug-1560).

src/scheduler/testsuite/test_clock.c

@@ -246,6 +246,53 @@ static void test_xce_sched_core_init_seeds_normal_mode_defaults(void)
         1, atomic_load_explicit(&(core.speed_den), memory_order_acquire));
 }
 
+/* ---------------------------------------------------------------------- */
+/* xce_core_set_wallclock_anchor() -- normal-mode epoch seeding (bug-1584) */
+/* ---------------------------------------------------------------------- */
+
+static uint64_t test_epoch_ns(void)
+{
+    struct timespec ts;
+
+    clock_gettime(CLOCK_REALTIME, &ts);
+    return ((uint64_t)ts.tv_sec * TEST_NSEC_PER_SEC) + (uint64_t)ts.tv_nsec;
+}
+
+static void test_xce_core_set_wallclock_anchor_seeds_real_epoch_time(void)
+{
+    /* bug-1584: xce_sched_core_init() alone leaves xce_core_now() returning
+     * raw CLOCK_MONOTONIC-since-boot nanoseconds (see
+     * test_xce_sched_core_init_seeds_normal_mode_defaults above) -- NOT
+     * epoch time, which every real consumer of a normal-mode timestamp
+     * needs (recording.c's record_start_ts, SchedAdminReply.startedAt,
+     * documented in controller.capnp as "nanoseconds since epoch").
+     * xce_core_set_wallclock_anchor() is the fix: bracket its effect on
+     * xce_core_now() between two back-to-back CLOCK_REALTIME reads taken
+     * immediately before/after the call -- deterministic (real time only
+     * moves forward) and immune to sleep-based flakiness. Before this fix,
+     * `result` would be a small monotonic-since-boot value, far below
+     * `before` (a real epoch value ~1.7e18 ns as of 2026) -- this bracket
+     * fails loudly on that regression rather than passing by coincidence. */
+    xce_sched_core_t core;
+    uint64_t         before, result, after;
+
+    fixture_init(&core);
+
+    before = test_epoch_ns();
+    xce_core_set_wallclock_anchor(&core);
+    result = xce_core_now(&core);
+    after  = test_epoch_ns();
+
+    TEST_ASSERT_TRUE(result >= before);
+    TEST_ASSERT_TRUE(result <= after);
+}
+
+static void test_xce_core_set_wallclock_anchor_null_core_is_a_safe_noop(void)
+{
+    /* Mirrors xce_core_now(NULL)'s defensive contract -- no crash. */
+    xce_core_set_wallclock_anchor(NULL);
+}
+
 /* ---------------------------------------------------------------------- */
 /* tlog format integration (Req 5 AC 3)                                    */
 /* ---------------------------------------------------------------------- */
@@ -451,6 +498,8 @@ int main(void)
     RUN_TEST(test_xce_core_now_fast_simulation_scales_up_by_speed);
     RUN_TEST(test_xce_core_now_slow_simulation_scales_down_by_speed);
     RUN_TEST(test_xce_sched_core_init_seeds_normal_mode_defaults);
+    RUN_TEST(test_xce_core_set_wallclock_anchor_seeds_real_epoch_time);
+    RUN_TEST(test_xce_core_set_wallclock_anchor_null_core_is_a_safe_noop);
     RUN_TEST(test_tlog_format_shows_frozen_virtual_time_not_infotime);
     RUN_TEST(test_tlog_format_frozen_time_is_stable_across_calls);
     RUN_TEST(test_tlog_format_falls_back_to_infotime_when_no_active_core);