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/pelias/pelias.json

@@ -10,13 +10,25 @@
 	},
 	"api": {
 		"services": {
-			"libpostal": "http://libpostal:4400"
+			"libpostal": {
+				"url": "http://libpostal:4400"
+			},
+			"placeholder": {
+				"url": "http://placeholder:4100"
+			},
+			"pip": {
+				"url": "http://pip:4200"
+			},
+			"interpolation": {
+				"url": "http://interpolation:4300"
+			}
 		},
-		"defaultParameters": {
-			"boundary.country": ["DEU", "AUT", "CHE"]
-		}
+		"defaultParameters": {}
 	},
 	"imports": {
+		"adminLookup": {
+			"enabled": false
+		},
 		"openstreetmap": {
 			"download": [
 				{
@@ -24,9 +36,19 @@
 				}
 			],
 			"datapath": "/data/openstreetmap",
-			"leveldbpath": "/tmp/leveldb",
+			"leveldbpath": "/data/leveldb",
 			"importVenues": true,
-			"importAddresses": true
+			"importAddresses": true,
+			"adminLookup": false,
+			"useAdminHierarchyLabels": false,
+			"leveldb": {
+				"cacheSize": 256
+			},
+			"import": [
+				{
+					"filename": "planet-latest.osm.pbf"
+				}
+			]
 		},
 		"polylines": {
 			"datapath": "/data/polylines",

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)