fix(geocoding): Pelias config for DACH-only import + single-country filter

After importing 22M OSM objects for the DACH extract:
- Disable adminLookup (no WOF data needed for address search)
- Configure leveldb path inside the data volume
- Specify planet-latest.osm.pbf as the import filename
- Convert libpostal service config from string to object form
- Drop boundary.country default — Pelias only accepts a single
  country value, and our index only contains DACH data anyway

Verified forward + reverse geocoding work end-to-end for Konstanz
test queries via the mana-geocoding wrapper on port 3018.

Known limitation: OSM category/type (amenity:restaurant etc.) is
not yet populated in Pelias responses — will require whitelisting
those tags in the importer config and re-running the import.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

services/mana-geocoding/src/routes/geocode.ts

@@ -65,11 +65,12 @@ export function createGeocodeRoutes(config: Config) {
 			return c.json({ results: cached, cached: true });
 		}
 
+		// Note: we don't set boundary.country — the Pelias index only
+		// contains DACH data, so everything is implicitly DE/AT/CH.
 		const params = new URLSearchParams({
 			text: q.trim(),
 			size: String(limit),
 			lang,
-			'boundary.country': 'DEU,AUT,CHE',
 		});
 
 		// Bias results towards a focus point (user's current location)