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.

.env.example

@@ -0,0 +1,10 @@
+# Only needed if we write the optional one-off InfluxDB → CSV export script.
+# The simulator itself reads CSVs from data/raw/ and does not need these.
+INFLUXDB_URL=http://localhost:8086
+INFLUXDB_TOKEN=
+INFLUXDB_ORG=
+INFLUXDB_BUCKET=
+
+# Optional fallbacks (only if a known InfluxDB gap needs filling):
+# ENTSOE_API_KEY=     # https://transparency.entsoe.eu/
+# KNMI / PVGIS need no key.