Technician tool v0.2

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

tests/test_manager.py

@@ -33,7 +33,7 @@ def test_loopback_lines_reset_and_disconnect(monkeypatch):
     m.connect(LOOP)
     assert _wait(lambda: m.state == State.CONNECTED)
 
-    m.write(b"stale tail\r\nESP-ROM:esp32s3-20210327\r\nE (5) INFLUX: token: s3cr3t\r\npartial")
+    m.write(b"stale tailESP-ROM:esp32s3-20210327\r\nE (5) INFLUX: token: s3cr3t\r\npartial")
     assert _wait(lambda: any(ln.text == "partial" for ln in lines))  # idle flush
     assert not any("stale" in ln.text for ln in lines)  # first fragment after open dropped
     m.reset_board()