Add enqueuing path in semaphore and mutex

This commit adds the missing enqueuing path for awakened tasks during
semaphore signaling and mutex unlocking, ensuring that tasks are
correctly inserted into the ready queue under the new scheduler design.

Author: vicLin8712

include/sys/task.h

@@ -312,3 +312,6 @@ void _sched_block(queue_t *wait_q);
  * Returns 'true' to enable preemptive scheduling, or 'false' for cooperative
  */
 int32_t app_main(void);
+
+/* Wake up and enqueue task into ready queue */
+void sched_wakeup_task(tcb_t *);

kernel/mutex.c

@@ -283,7 +283,7 @@ int32_t mo_mutex_unlock(mutex_t *m)
             /* Validate task state before waking */
             if (likely(next_owner->state == TASK_BLOCKED)) {
                 m->owner_tid = next_owner->id;
-                next_owner->state = TASK_READY;
+                sched_wakeup_task(next_owner);
                 /* Clear any pending timeout since we're granting ownership */
                 next_owner->delay = 0;
             } else {

kernel/semaphore.c

@@ -176,7 +176,7 @@ void mo_sem_signal(sem_t *s)
         if (likely(awakened_task)) {
             /* Validate awakened task state consistency */
             if (likely(awakened_task->state == TASK_BLOCKED)) {
-                awakened_task->state = TASK_READY;
+                sched_wakeup_task(awakened_task);
                 should_yield = true;
             } else {
                 /* Task state inconsistency - this should not happen */