feat: add sched GC predicate statics; wire sel_optimize_set(1) in sched_init (6-4, 6-9)

src/scheduler/testsuite/test.c

@@ -5,6 +5,8 @@
 #include <stdatomic.h>
 #include <unity/unity.h>
 
+#include "resreq.h"
+
 /* Minimal struct declaration to verify atomic fields exist.
  * We avoid including scheduler.h to prevent dependency on capnp headers. */
 typedef struct {
@@ -87,6 +89,20 @@ test_scheduler_t_has_atomic_gc_fields(void)
     TEST_ASSERT_EQUAL_INT(0, atomic_load(&sched.staging_merge_complete));
 }
 
+static void
+test_sel_optimize_set_at_scheduler_startup(void)
+{
+    /* sel_optimize_set(1) is called in sched_init.
+     * Since we can't call sched_init (it starts threads/network),
+     * verify the setter/getter contract directly. */
+    sel_optimize_set(1);
+    TEST_ASSERT_EQUAL_INT(1, sel_get_optimize_level());
+    /* reset for clean test isolation */
+#ifdef UNIT_TEST
+    sel_optimize_test_reset();
+#endif
+}
+
 #define TEST(x)                                                                \
     do {                                                                       \
         if (check_test(&arguments, #x)) {                                      \
@@ -101,6 +117,7 @@ int main(int argc, char* argv[])
     UNITY_BEGIN();
 
     TEST(test_scheduler_t_has_atomic_gc_fields);
+    TEST(test_sel_optimize_set_at_scheduler_startup);
 
     return UNITY_END();
 }