pass config_entry to DataUpdateCoordinator; fix deprecation warnings

[okaufmann]

Related: #62

Problem

• Home Assistant warned that async_config_entry_first_refresh is only supported when the coordinator is bound to a config entry.

Change

• Update all coordinators to accept an optional config_entry and pass it to the base DataUpdateCoordinator.
• Wire config_entry from async_setup_entry when constructing coordinators.

Impact

• Removes deprecation warnings in HA logs.
• No behavior change for data fetching/writing.

Testing

• Manual: reload integration and confirm no deprecation warnings present.

[toggm]

Thanks!

[toggm]

@okaufmann You need to:

1. fix the linter issues ( python3 -m ruff check . ) and possibly reformat the files (python3 -m ruff format)
2. fix the integration in the tests so they success (python3 -m pip install -r requirements.test.txt && python3 -m pytest)

Let me know if you need help.

[toggm]

@okaufmann Any progress on this or do you need help?