fix(prediction): green up CI for the new PV providers (mypy + provider sequence)

- Use urllib.parse.quote instead of requests.utils.quote in the pvnode and
  Solcast providers: the runtime re-export exists, but the requests type stubs
  do not declare it, so the pre-commit mypy hook failed with
  'Module has no attribute "quote"'.
- Mark the force_update keyword in the new provider tests with `# type: ignore`
  — it is consumed by the cache_in_file decorator at runtime; same call
  convention and ignore style as pvforecastakkudoktor.py.
- Add PVForecastPVNode, PVForecastForecastSolar and PVForecastSolcast to the
  expected provider sequence in tests/test_prediction.py (fixture + index
  assertions) — the two sequence tests failed because the new providers were
  registered in prediction.py but missing from the hardcoded expectations.

src/akkudoktoreos/prediction/pvforecastsolcast.py

@@ -18,6 +18,7 @@ Notes:
 
 import re
 from typing import Any, Optional
+from urllib.parse import quote
 
 import requests
 from loguru import logger
@@ -84,7 +85,7 @@ class PVForecastSolcast(PVForecastProvider):
         if not settings.api_key or not settings.site_id:
             raise ValueError("PVForecastSolcast requires api_key and site_id")
 
-        url = f"{SOLCAST_BASE}/{requests.utils.quote(settings.site_id, safe='')}/forecasts"
+        url = f"{SOLCAST_BASE}/{quote(settings.site_id, safe='')}/forecasts"
         params = {"format": "json", "hours": "72"}
         headers = {"Authorization": f"Bearer {settings.api_key}", "Accept": "application/json"}
         logger.debug(f"Requesting Solcast forecast: {url}")