feat: add pinned inventory location enrichment

tests/fixtures/esi/transport-metadata.json

@@ -2,6 +2,17 @@
   "compatibilityDate": "2026-08-18",
   "evidence": {
     "assetHelpers": { "source": "docs/research/eve-openapi-evidence.json", "verification": "pinned-authoritative" },
+    "privateStructure": {
+      "source": "docs/research/eve-openapi-evidence.json",
+      "verification": "pinned-authoritative",
+      "operationId": "GetUniverseStructuresStructureId",
+      "route": "/universe/structures/{structure_id}",
+      "method": "GET",
+      "requiredScope": "esi-universe.read_structures.v1",
+      "response": { "status": 200, "mediaType": "application/json", "shape": "name/solar_system_id/owner_id with optional type_id/position" },
+      "deniedStatus": 403,
+      "cache": { "ttlSeconds": 3600, "policy": "ttl-based", "validators": ["Cache-Control", "ETag", "Last-Modified"] }
+    },
     "walletBalance": {
       "source": "https://esi.evetech.net/meta/openapi.json?compatibility_date=2026-08-18",
       "verification": "current-retrieval-with-pinned-compatibility-date-not-historical-capture",
@@ -28,6 +39,7 @@
   "operations": {
     "characterAssetNames": { "route": "/characters/{character_id}/assets/names", "method": "POST", "requiredScope": "esi-assets.read_assets.v1" },
     "characterAssetLocations": { "route": "/characters/{character_id}/assets/locations", "method": "POST", "requiredScope": "esi-assets.read_assets.v1" },
+    "characterStructure": { "route": "/universe/structures/{structure_id}", "method": "GET", "requiredScope": "esi-universe.read_structures.v1" },
     "characterWalletBalance": { "route": "/characters/{character_id}/wallet", "method": "GET", "requiredScope": "esi-wallet.read_character_wallet.v1" }
   }
 }