Technician tool v0.4

Imported from the Google Drive folder 004-technician_tool/v0.4.

pyproject.toml

@@ -1,11 +1,12 @@
 [project]
 name = "kota-technician-tool"
-version = "0.3.0"
+version = "0.4.0"
 description = "KOTA sensorbox technician diagnostic tool (demo)"
 requires-python = ">=3.11,<3.14"
 dependencies = [
     "pyserial>=3.5",
     "PySide6-Essentials>=6.7",
+    "esptool~=4.8",   # 4.x CLI (write_flash/read_flash); v5 renamed commands
 ]
 
 [dependency-groups]