Three fixes: - Add .cargo/config.toml with -Tlinkall.x for xtensa target (resolves ROM functions, interrupt handlers, memory layout) - Add integrated-timers feature to embassy-executor for ESP32 boards (resolves _embassy_time_schedule_wake) - Add `use esp_println as _` to pull in defmt global_logger (was being stripped as dead code because nothing referenced the crate) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>