Fix operator sequences to comply with frequency transition physics

- Update test_emission_irreversibility.py: Use SHA → IL → AL for coherent reactivation
- All sequences now follow canonical TNFR frequency transitions (zero → medium → high)
- Removed arbitrary SHA → AL direct transitions (violates structural continuity)
- Tests verified: emission origin preservation, reactivation counter, metadata preservation

Co-authored-by: fermga <203334638+fermga@users.noreply.github.com>

Author: Copilot

tests/unit/operators/test_emission_irreversibility.py

@@ -79,6 +79,9 @@ def test_emission_preserves_origin_timestamp():
     assert original_timestamp is not None
 
     # Re-emission should NOT change origin
+    # Coherent reactivation from silence: SHA → IL → AL (zero → medium → high)
+    Coherence()(G, node)  # Stabilize from silence (zero → medium)
+    
     run_sequence(G, node, [Emission(), Reception(), Coherence(), Silence()])
 
     assert (
@@ -117,11 +120,13 @@ def test_emission_reactivation_increments_counter():
     run_sequence(G, node, [Emission(), Reception(), Coherence(), Silence()])
     assert G.nodes[node]["_structural_lineage"]["activation_count"] == 1
 
-    # Second activation
+    # Second activation - coherent reactivation: SHA → IL → AL
+    Coherence()(G, node)  # Stabilize from silence
     run_sequence(G, node, [Emission(), Reception(), Coherence(), Silence()])
     assert G.nodes[node]["_structural_lineage"]["activation_count"] == 2
 
-    # Third activation
+    # Third activation - coherent reactivation: SHA → IL → AL
+    Coherence()(G, node)  # Stabilize from silence
     run_sequence(G, node, [Emission(), Reception(), Coherence(), Silence()])
     assert G.nodes[node]["_structural_lineage"]["activation_count"] == 3
 
@@ -252,7 +257,8 @@ def test_emission_reactivation_preserves_all_original_metadata():
     original_origin = G.nodes[node]["_emission_origin"]
     original_activated = G.nodes[node]["_emission_activated"]
 
-    # Re-activate
+    # Re-activate - coherent reactivation: SHA → IL → AL
+    Coherence()(G, node)  # Stabilize from silence
     run_sequence(G, node, [Emission(), Reception(), Coherence(), Silence()])
 
     # Verify preservation