Technician tool v0.2

Imported from the Google Drive folder 004-technician_tool/v0.2.

kota_tech/core/session.py

@@ -33,6 +33,13 @@ class SessionLog:
         self._fh.write(f"[{ts}] {line.text}\n")
         self._fh.flush()
 
+    def write_report(self, text: str) -> None:
+        """Append the diagnosis at the end of the session (for the firmware team)."""
+        if self._fh is None:
+            return
+        self._fh.write("\n===== Diagnosis at end of session =====\n" + text + "\n")
+        self._fh.flush()
+
     def stop(self) -> None:
         if self._fh is not None:
             self._fh.close()