fix(console): gate adcTask logs on console-writer readiness

B1 on-board closed loop surfaced a byte-level console interleave: before
the console writer (defaultTask) registers, con_append() routes to
dbg_console_write_raw() -> con_tx_bounded(), which is register-level
polling with no mutual exclusion. adcTask logged every 1 ms, so its
first-frame line collided with defaultTask's [NAND_FTL] init line and
the required marker spanned two interleaved lines -> false FAIL.

- console_log: add dbg_console_writer_ready() (returns s_con_writer_up)
- adc_task: gate first-frame and 10 s stats logs on writer readiness;
  defer the first-frame report until the writer is up
- docs: close B1/P1-1 in the registry; flip stale "remaining @test"
  notes; correct the console doc's obsolete "drop-only, no interleave"
  claim (that held for HAL gState, not register-level raw send)

Bench (run_boot_test.py): VERDICT PASS, readback OK. adcTask
frames/seq +10000 per 10 s = 1000 Hz, idle=0, frst_err=0; stack
496/2048 (75%). @build 0/0.

App/log/console_log.h

@@ -34,6 +34,10 @@ extern "C" {
  *                               DBG_PRINT 宏内用库 snprintf 完成）
  *   dbg_console_write_raw    - 异常/早期路径：有界单次直发（不加锁）
  *   dbg_console_writer_attach- 写者任务（defaultTask）注册自己为唯一发送者
+ *   dbg_console_writer_ready - 写者是否已注册（1=已注册）。供**周期性任务**在写者就绪前
+ *                              抑制日志用：写者未注册时 con_append 走无锁直发路径
+ *                              （仅假设 defaultTask 在日志），其余任务此时落日志会与
+ *                              defaultTask 的存储初始化日志字节级交错（2026-10-10 台架实测）
  *   dbg_console_drain        - 写者任务排空缓冲并发送（单次有界；TX 失败自动软复位自愈）
  *   dbg_console_dropped      - 因缓冲满丢弃的行数（诊断）
  *   dbg_console_tx_fault     - 因僵尸通道软复位自愈的次数（诊断）
@@ -47,6 +51,7 @@ extern "C" {
 int      dbg_console_write_line(const char *line, unsigned len);
 void     dbg_console_write_raw(const char *buf, unsigned len);
 void     dbg_console_writer_attach(void);
+uint8_t  dbg_console_writer_ready(void);
 void     dbg_console_drain(void);
 uint32_t dbg_console_dropped(void);
 uint32_t dbg_console_tx_fault(void);