feat(xce-harness-component): promote ctrlstatus_fmt.h to shared xce/ include path

Move the one genuinely shared header (header-only, static inline, zero
link dependency) from src/controller/testsuite/ to src/include/xce/,
alongside the existing cross-daemon shared headers (cluster.h, types.h,
errnox.h). Repoint its three current consumers (harness's test.c and
joblist_display.c, controller's test_ctrlstatus.c) to the new path.
test_joblist_display.c is intentionally left on the old path -- it
relocates in task 2.2.

Also removes src/harness/meson.build's temporary '../controller/testsuite'
incdir shim, which task 1.1 added and explicitly marked for removal once
this task landed.

controller_unit_test: 1228 Tests 0 Failures 0 Ignored (unchanged from
task 1.1's baseline, confirming a header-path-only change).

Task 1.2 of xce-harness-component.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RLSNJhNoULvVcUhXEFafQC

.kiro/specs/xce-harness-component/tasks.md

@@ -9,7 +9,7 @@
   - The 11 removed test files' `.c` sources are left on disk at their current `src/controller/testsuite/` path for now (referenced by no build target) — task 2.1 physically relocates them together with `test_test_cli.c`/`test_xcetest_process_entry.c`
   - Observable: a harness-scoped build produces an `xce_test` binary; a controller-scoped build run immediately after this single task (no later tasks applied) still succeeds, `controller_unit_test`'s reported test count has dropped by exactly the 11 removed entries, and none of the four standalone binaries are defined anymore
   - _Requirements: 1.1, 1.2, 1.3, 2.1, 2.2, 2.4_
-- [ ] 1.2 Promote the shared ctrlstatus_fmt.h header and repoint its current consumers
+- [x] 1.2 Promote the shared ctrlstatus_fmt.h header and repoint its current consumers
   - Move `ctrlstatus_fmt.h` to `src/include/xce/`; update the include path in harness's `test.c` and `joblist_display.c` (already relocated in 1.1) and in controller's `test_ctrlstatus.c`
   - `joblist_display.c`'s own test file, `test_joblist_display.c`, still lives in `src/controller/testsuite/` at this point and is intentionally left untouched here — its include-path fix happens in task 2.2, when that file relocates
   - Observable: a repo-wide search finds no remaining relative `#include "ctrlstatus_fmt.h"`; all three current consumers include it from `xce/ctrlstatus_fmt.h`

src/controller/testsuite/test_ctrlstatus.c

@@ -22,7 +22,7 @@
 #include "persist.h"
 #include "xce/cluster_def.h"
 
-#include "ctrlstatus_fmt.h" /* ctrlstatus_format_time_ms (task 6.3) */
+#include "xce/ctrlstatus_fmt.h" /* ctrlstatus_format_time_ms (task 6.3) */
 
 /* ── helpers ────────────────────────────────────────────────── */
 

src/harness/joblist_display.c

@@ -8,7 +8,7 @@
 
 #include <stdio.h> /* snprintf */
 
-#include "ctrlstatus_fmt.h" /* ctrlstatus_format_time_ms */
+#include "xce/ctrlstatus_fmt.h" /* ctrlstatus_format_time_ms */
 #include "xce/types.h"      /* XCE_WORKER_*, JOB_STAT_* bit definitions */
 
 char* worker_status_str(uint32_t status)

src/harness/meson.build

@@ -1,13 +1,4 @@
-# TEMPORARY (xce-harness-component task 1.1): '../controller/testsuite' is
-# only here so the bare `#include "ctrlstatus_fmt.h"` in test.c/
-# joblist_display.c keeps resolving -- ctrlstatus_fmt.h itself still
-# physically lives at src/controller/testsuite/ctrlstatus_fmt.h pending
-# task 1.2, which promotes it to src/include/xce/ctrlstatus_fmt.h and
-# repoints these two #include lines at it. Remove this entry when task 1.2
-# lands (it will make it redundant, since src/include is already on this
-# path via '../include').
-incdir = include_directories('.', '../include', '../lib', 'include',
-                              '../controller/testsuite')
+incdir = include_directories('.', '../include', '../lib', 'include')
 
 zlib_dep = dependency('zlib')
 

src/harness/test.c

@@ -23,7 +23,7 @@
 #include "client.h"
 #include "config.h" /* XCE_MAXNAME_LEN */
 #include "controller.capnp.h"
-#include "ctrlstatus_fmt.h" /* ctrlstatus_format_time_ms (task 6.3) */
+#include "xce/ctrlstatus_fmt.h" /* ctrlstatus_format_time_ms (task 6.3) */
 #include "delay.h"
 #include "flagspec.h" /* shared flagspec_t descriptor-table flag parsing,
                         * rejection (with typo suggestion), and help