Tools: PID debug toolchain from V0.1.x bring-up

test_run.py: judged closed-loop test over COM5 (fixed sequence, J1~J4

log_tail.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+"""Parse live temperature frames from test_events.log tail (test writes it live)."""
+import re
+import sys
+
+n = int(sys.argv[1]) if len(sys.argv) > 1 else 60
+rows = []
+for ln in open("test_events.log", encoding="utf-8", errors="replace"):
+    m = re.match(r"^([\d.]+) . ([\d.]+)  \[B5", ln)
+    if m:
+        rows.append((float(m.group(1)), float(m.group(2))))
+print(f"{len(rows)} temp frames total")
+if len(rows) > 10:
+    t1, v1 = rows[8]
+    t2, v2 = rows[-1]
+    print(f"{v1:.1f}C@{t1:.0f}s -> {v2:.1f}C@{t2:.0f}s  slope={(v2-v1)/(t2-t1):.3f} C/s")
+    for t, v in rows[-8:]:
+        print(f"  t={t:7.1f}s {v:6.1f}C")