wip: BT firmware debugging

kernel/src/Drivers/USB/Bluetooth/Hci.hpp

@@ -265,11 +265,12 @@ namespace Drivers::USB::Bluetooth::Hci {
     // Returns true if a matching bond was found and forgotten.
     bool ForgetBond(const uint8_t* addr);
 
-    // Toggle the bounded firmware-phase interrupt-IN trace (one log line per
-    // completion, capped) plus mailbox-overwrite flags.  Enabled by the
-    // deferred bring-up so a failing hardware boot log shows exactly what the
-    // event pipe delivered.
+    // Toggle the bounded firmware-phase interrupt-IN trace (one ring record
+    // per completion, capped).  Recording is IRQ-safe (lock-free ring, no
+    // logging); DumpFwTrace() prints pending records and MUST only be called
+    // from process context (terminal lock is a non-IRQ-safe Mutex).
     void SetFwTrace(bool on);
+    void DumpFwTrace();
 
     // Non-blocking peek at the most recent 0xFF/0x06 secure-send result without
     // consuming it.  Returns true if one has arrived since the last