dangernoodle-io / TaipanMiner / 24210156380

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fix: resolve concurrency issues and WDT reboot loop causing tdongle hangs (#81)

- fix mining pause/resume semaphore corruption (spurious s_pause_done token)
- add SO_SNDTIMEO 10s on stratum connect() and send()
- reduce HTTP recv_wait_timeout from 86400 to 30s
- reduce SSE SO_RCVTIMEO from 86400 to 30s
- add CONFIG_ESP_TASK_WDT_PANIC=y for auto-recovery on hang
- replace blocking vTaskDelay in WiFi disconnect handler with esp_timer
- add stratum connected flag, clear work_queue on disconnect
- increase result_queue from 2 to 16
- change mutex try-lock timeout from 0 to 2ms at all stat write sites
- add volatile to s_sse_task_handle
- move s_ota_in_progress read inside critical section
- cap DNS retries (CONFIG_LWIP_DNS_MAX_RETRIES=2)
- disable IDLE1 watchdog monitoring (CPU1 is CPU-bound mining by design)
- subscribe mining task to TWDT directly, feed at each yield point
- add reset reason logging with NVS wdt_resets counter
- clear wdt_resets on OTA firmware validation
- add boot_time, reset_reason, wdt_resets to /api/info and Info page
- add fmtDate() for consistent date formatting across UI

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

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