release: silence runtime logs and stabilize benches

- Fix HAKMEM_LOG gating to use  (numeric) so release builds compile out logs.
- Switch remaining prints to HAKMEM_LOG or guard with :
  - core/box/hak_core_init.inc.h (EVO sample warning, shutdown banner)
  - core/hakmem_config.c (config/feature prints)
  - core/hakmem.c (BigCache eviction prints)
  - core/hakmem_tiny_superslab.c (OOM, head init/expand, C7 init diagnostics)
  - core/hakmem_elo.c (init/evolution)
  - core/hakmem_batch.c (init/flush/stats)
  - core/hakmem_ace.c (33KB route diagnostics)
  - core/hakmem_ace_controller.c (ACE logs macro → no-op in release)
  - core/hakmem_site_rules.c (init banner)
  - core/box/hak_free_api.inc.h (unknown method error → release-gated)
- Rebuilt benches and verified quiet output for release:
  - bench_fixed_size_hakmem/system
  - bench_random_mixed_hakmem/system
  - bench_mid_large_mt_hakmem/system
  - bench_comprehensive_hakmem/system

Note: Kept debug logs available in debug builds and when explicitly toggled via env.

core/hakmem_site_rules.c

@@ -9,6 +9,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <time.h>
+#include "hakmem_internal.h"
 
 // ===========================================================================
 // Internal Data Structures
@@ -88,7 +89,9 @@ void hak_site_rules_init(void) {
     memset(&g_site_rules, 0, sizeof(g_site_rules));
     g_site_rules.initialized = 1;
 
-    printf("[SiteRules] Initialized (MVP: 4-probe hash, capacity=%d)\n", SITE_RULES_CAPACITY);
+    #if !HAKMEM_BUILD_RELEASE
+    fprintf(stderr, "[SiteRules] Initialized (MVP: 4-probe hash, capacity=%d)\n", SITE_RULES_CAPACITY);
+    #endif
 }
 
 void hak_site_rules_shutdown(void) {