Fix coherence tests: Add IL stabilization for SHA→AL reactivation

- Update test_coherence_ct_tracking.py: Add Coherence() before reactivation in loops
- Update test_coherence_dnfr_reduction.py: Add IL step for coherent frequency transitions (3 tests)
- All tests now follow canonical pattern: SHA → IL → AL (zero → medium → high)
- Fixes 4 failing tests that were using direct SHA → AL transitions in loops

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

Author: Copilot

tests/unit/operators/test_coherence_ct_tracking.py

@@ -356,7 +356,12 @@ def test_coherence_tracking_accumulates():
     G.nodes[node][DNFR_PRIMARY] = 0.30
 
     # Apply Coherence 3 times in canonical sequences
-    for _ in range(3):
+    # First sequence
+    run_sequence(G, node, [Emission(), Reception(), Coherence(), Silence()])
+    
+    # Subsequent sequences need reactivation: SHA → IL → AL
+    for _ in range(2):
+        Coherence()(G, node)  # Reactivate from silence (zero → medium)
         run_sequence(G, node, [Emission(), Reception(), Coherence(), Silence()])
 
     # Verify 3 tracking events logged

tests/unit/operators/test_coherence_dnfr_reduction.py

@@ -170,7 +170,12 @@ def test_coherence_multiple_applications_converge_to_zero():
     G.nodes[node][DNFR_PRIMARY] = initial_dnfr
 
     # Apply Coherence operator 10 times in canonical sequences
-    for _ in range(10):
+    # First application
+    run_sequence(G, node, [Emission(), Reception(), Coherence(), Silence()])
+    
+    # Subsequent applications need reactivation: SHA → IL → AL
+    for _ in range(9):
+        Coherence()(G, node)  # Reactivate from silence
         run_sequence(G, node, [Emission(), Reception(), Coherence(), Silence()])
 
     final_dnfr = G.nodes[node][DNFR_PRIMARY]
@@ -229,7 +234,12 @@ def test_coherence_telemetry_accumulates():
     G.nodes[node][DNFR_PRIMARY] = 0.20
 
     # Apply Coherence 3 times in canonical sequences
-    for _ in range(3):
+    # First application
+    run_sequence(G, node, [Emission(), Reception(), Coherence(), Silence()])
+    
+    # Subsequent applications need reactivation
+    for _ in range(2):
+        Coherence()(G, node)  # Reactivate from silence
         run_sequence(G, node, [Emission(), Reception(), Coherence(), Silence()])
 
     # Verify 3 telemetry events logged
@@ -346,7 +356,12 @@ def test_coherence_nodal_equation_compliance():
     G.nodes[node][DNFR_PRIMARY] = initial_dnfr
 
     # Apply Coherence multiple times in canonical sequences
-    for i in range(5):
+    # First application
+    run_sequence(G, node, [Emission(), Reception(), Coherence(), Silence()])
+    
+    # Subsequent applications need reactivation
+    for i in range(4):
+        Coherence()(G, node)  # Reactivate from silence
         run_sequence(G, node, [Emission(), Reception(), Coherence(), Silence()])
 
         # Verify ΔNFR is decreasing