Initial import: home-battery ROI simulator + cracked thuisbatterijgids calc

- Hourly data exporter (InfluxDB → CSV) for prices, P1, irradiance.
- LP-based 24h-foresight oracle dispatch with SoC-consistent state engine.
- Reverse-engineered thuisbatterijgids.nl formula (matches their quotes
  to within €0.50 across three battery configs).
- Catalog scraper for the 52 batteries on thuisbatterijgids.net via their
  /wp-json REST endpoint.
- Web app (Flask) that ranks every catalog battery by honest payback and
  contrasts with the store's quote, deployable via the included Procfile.

.gitignore

@@ -0,0 +1,26 @@
+.env
+
+__pycache__/
+*.pyc
+.venv/
+venv/
+dist/
+build/
+*.egg-info/
+.pytest_cache/
+.ruff_cache/
+.mypy_cache/
+.ipynb_checkpoints/
+
+# Downloaded historical data — large, regenerable, not for git.
+# Negations only work against patterns matching the file (not the parent dir),
+# so we ignore *contents* and selectively re-include the small runtime files.
+data/raw/*
+data/processed/*
+!data/raw/prices_hourly.csv
+!data/raw/p1_hourly.csv
+!data/raw/solar_hourly.csv
+!data/raw/thuisbatterijgids_catalog.csv
+!data/raw/thuisbatterijgids_catalog.json
+
+.DS_Store