Restore the bank fold and usage publish to the resume path, guard setActive against repeats, and make the meter fold's bound literal

The resume also hands back to a full reload when the fold moves the loaded capture's decode source, so the refs table and the audio cannot skew.

tests/test_meter_accumulate.cpp

@@ -20,7 +20,8 @@ static int g_fail = 0;
 
 // Stands in for std::atomic<float> with ONE scripted interference: the first compare-exchange
 // runs the UI's consume (identity reinstalled, the window taken) and reports failure exactly as
-// the real CAS does — expected updated to what the consume left. Everything after is ordinary.
+// the real CAS does — expected updated to what the consume left. Everything after is ordinary,
+// which is what makes the retry count assertable: a strong CAS fails only under interference.
 struct ConsumingAccumulator {
     float value;
     float identity;
@@ -29,8 +30,8 @@ struct ConsumingAccumulator {
 
     float load(std::memory_order) const { return value; }
 
-    bool compare_exchange_weak(float& expected, float desired, std::memory_order,
-                               std::memory_order) {
+    bool compare_exchange_strong(float& expected, float desired, std::memory_order,
+                                 std::memory_order) {
         if (casCount++ == 0) {
             consumed = value;
             value = identity;