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J. Nick Koston
74153e55ac
Version the crash data by encoding the version in the magic value (upper 16 bits = 0xDEAD sentinel, lower 16 bits = version). This allows safely changing the scratch register layout in future firmware without misinterpreting old crash data, and costs zero scratch registers (we only have 8). Add USE_RP2040_CRASH_HANDLER define and guard all call sites so the crash handler can be conditionally compiled, matching the ESP32 crash handler pattern. Add crash_handler_has_data() so callers can check for crash data without triggering log output. Log crash data when the API client subscribes to logs so dashboard and HA users see crash reports even when connecting after boot, matching the ESP32 crash handler behavior.
