Infrastructure and build updates

- Update build configuration and flags
- Add missing header files and dependencies
- Update TLS list implementation with proper scoping
- Fix various compilation warnings and issues
- Update debug ring and tiny allocation infrastructure
- Update benchmark results documentation

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

core/hakmem_tiny_sfc.c

@@ -31,7 +31,7 @@ sfc_stats_t g_sfc_stats[TINY_NUM_CLASSES] = {0};
 // Box 5-NEW: Global Config (from ENV)
 // ============================================================================
 
-int g_sfc_enabled = 0;  // Default: OFF (A/B testing)
+int g_sfc_enabled = 1;  // Default: ON (bench-focused; A/B via HAKMEM_SFC_ENABLE)
 
 static int g_sfc_default_capacity = SFC_DEFAULT_CAPACITY;
 static int g_sfc_default_refill = SFC_DEFAULT_REFILL_COUNT;
@@ -110,6 +110,9 @@ void sfc_init(void) {
         }
     }
 
+    // Register shutdown hook for optional stats dump
+    atexit(sfc_shutdown);
+
     // One-shot debug log
     static int debug_printed = 0;
     if (!debug_printed) {
@@ -144,6 +147,37 @@ void sfc_shutdown(void) {
     // No cleanup needed (TLS memory freed by OS)
 }
 
+// Cascade a first batch from TLS SLL into SFC after TLS prewarm.
+// Hot classes only (0..3 and 5) to focus on 256B/小サイズ。
+void sfc_cascade_from_tls_initial(void) {
+    if (!g_sfc_enabled) return;
+    // TLS SLL externs
+    extern __thread void* g_tls_sll_head[];
+    extern __thread uint32_t g_tls_sll_count[];
+    for (int cls = 0; cls < TINY_NUM_CLASSES; cls++) {
+        if (!(cls <= 3 || cls == 5)) continue;  // focus: 8..64B and 256B
+        uint32_t cap = g_sfc_capacity[cls];
+        if (cap == 0) continue;
+        // target: max half of SFC cap or available SLL count
+        uint32_t avail = g_tls_sll_count[cls];
+        if (avail == 0) continue;
+        uint32_t target = cap / 2;
+        if (target == 0) target = (avail < 16 ? avail : 16);
+        if (target > avail) target = avail;
+        // transfer
+        while (target-- > 0 && g_tls_sll_count[cls] > 0 && g_sfc_count[cls] < g_sfc_capacity[cls]) {
+            void* ptr = NULL;
+            // pop one from SLL
+            extern int tls_sll_pop(int class_idx, void** out_ptr);
+            if (!tls_sll_pop(cls, &ptr)) break;
+            // push into SFC
+            tiny_next_store(ptr, cls, g_sfc_head[cls]);
+            g_sfc_head[cls] = ptr;
+            g_sfc_count[cls]++;
+        }
+    }
+}
+
 // ============================================================================
 // Box 5-NEW: Refill (Slow Path) - STUB (real logic in hakmem.c)
 // ============================================================================