[przemhb]

Summary

Adds passive advertisement support for the Thermosafer children’s thermometer described in #1530. Temperature and battery are decoded from manufacturer-specific data, without a GATT connection. RSSI is supplied by the BLE scanner.

The parser recognizes the observed manufacturer ID, payload length and first payload byte. It decodes temperature from two big-endian bytes in hundredths of a degree and battery from one byte. This format is reverse-engineered from observations of one device; the meaning of the remaining fields and signedness at temperatures below zero are unverified.

Testing

• Added a test using observed advertising data in a synthetic extended HCI report and tests for malformed payloads.
• PYTEST_DISABLE_PLUGIN_AUTOLOAD=1 python -m pytest -o addopts='' custom_components/ble_monitor/test/test_thermosafer.py -q — 2 passed. The default pytest invocation hung in the local environment; full suite and normal CI remain to be verified.

Fixes #1530