Bump python from 3.13-alpine to 3.14-alpine

[dependabot]

Bumps python from 3.13-alpine to 3.14-alpine.

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[MaStr]

Python 3.14 Upgrade — Required Code Changes

Upgrading to Python 3.14 is not a simple Dockerfile bump. Python 3.14 introduces breaking changes that affect this codebase. Here is a summary of what needs to be fixed before this PR can be merged.

1. asyncio.get_event_loop() now raises RuntimeError (HIGH priority)

In Python 3.14, calling asyncio.get_event_loop() when no event loop is running raises RuntimeError instead of silently creating a new loop. This was a DeprecationWarning since 3.10, but is now a hard error.

Affected files:

• src/batcontrol/forecastconsumption/forecast_homeassistant.py (lines 175, 679)
• src/batcontrol/forecastsolar/forecast_homeassistant_ml.py (lines 144, 318)
• tests/batcontrol/forecastconsumption/test_homeassistant.py (line 980)

Pattern to replace:

# OLD — breaks on 3.14:
try:
    loop = asyncio.get_event_loop()
except RuntimeError:
    loop = asyncio.new_event_loop()
    asyncio.set_event_loop(loop)
result = loop.run_until_complete(some_coroutine())


# NEW — works on 3.9 through 3.14:
result = asyncio.run(some_coroutine())

Special case: _fetch_bulk_data() in forecast_homeassistant.py (line 679) uses a persistent WebSocket connection across multiple run_until_complete() calls in a loop. This needs to be refactored into a single async method that is then called once via asyncio.run(). This is the most involved change.

2. Compatibility with Python 3.9+

asyncio.run() has been available since Python 3.7, so all replacements are fully backward-compatible with the currently supported Python versions (3.9+). No version-conditional code is needed.

3. Other Python 3.14 changes (no impact on this codebase)

The following Python 3.14 breaking changes were reviewed and found to have no impact on batcontrol:

• Removal of ast.Num, ast.Str, etc. — not used
• Removal of pkgutil.find_loader() / get_loader() — not used
• Multiprocessing default start method change to forkserver — not used
• NotImplemented in boolean context raises TypeError — not used
• asyncio child watcher removal — not used

Summary

Task	Effort	Files
Replace get_event_loop() + run_until_complete() with asyncio.run()	Small	forecast_homeassistant_ml.py, test_homeassistant.py
Refactor _fetch_bulk_data() to single async entry point	Medium	forecast_homeassistant.py
Update CI matrix to include 3.14	Small	.github/workflows/

The Dockerfile bump alone is not sufficient — the asyncio changes must be applied first, otherwise the HomeAssistant consumption forecast and ML solar forecast will crash at runtime.