Update regex to parse logbook for FCR-D

[jenshorn]

There appears to have been some changes in the logbook over time and this regex should improve fetching the data.

The existing regex supports the old format
[ FCR-D ACTIVATED ] example@example.com --12345-- 97,7/0,5/99,3 % (7 kW) 2024-07-07 00:08:19 API-BACKEND
In recent logs the power is defined as (7,0/7,0 kW). There also appears to be an intermediate definition of (7/7 kW) but this regex does not handle those cases.

This new regex also handles both the failed activation logs as well as deactivation in the format of:
[ FCR-D FAIL ACTIVATION ] 54x example@example.com --12345-- 85,9/0,6/97,0 % (10,0/10,0 kW) 2025-04-24 00:02:57 API-BACKEND
[ FCR-D DEACTIVATE ] UP 49,83 Hz 0,0 % (6 kW) 2025-01-31 00:16:00 API-BACKEND

On some occasions the power is identified as INF but that is not handled by this regex.

Otherwise the changes should be backwards compatible with the note that group 8 changes from 7 to 7,0/7,0.