Code review fixes + 13 middot added to spec

Zerikah fail-safe: empty offerings rejected, not processed (BUILD_KORBAN §5).
Halt monitor hardened: trap_exit, priority max, EXIT handler (Architecture spec).
13 Rules of Rabbi Yishmael added to Architecture §3.4 as Prolog inference predicates —
the engine reasons WITH Torah's hermeneutic methods, not just about their products.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

korban_processor/test/test_zerikah.py

@@ -164,13 +164,16 @@ class TestZerikah:
         assert vital == ""
         assert discarded == []
 
-    def test_all_filler_fallback_preserves_content(self):
-        """If nothing is vital, zerikah preserves everything rather than discarding all."""
+    def test_all_filler_rejected(self):
+        """
+        If nothing is vital, zerikah returns empty vital content.
+        BUILD_KORBAN.md §5: the offering without vital organs is rejected.
+        """
         filler = "There are many perspectives. People disagree. Context matters."
         korban = make_korban(filler)
         vital, discarded = zerikah(filler, korban)
-        # Since nothing qualifies as vital, fallback returns everything
-        assert vital != "" or discarded == []
+        assert vital == ""
+        assert len(discarded) > 0
 
     def test_stateless_between_calls(self):
         """Kiyyor principle: second call unaffected by first."""