feat(import-fifa17): seed unopenedPackIds as Core entitlements

Carry unopenedPackIds through the importer: Profile model -> Report ->
ApplyPlan. GenericImportRequest now emits entitlements[] (one definition_id
per unopened pack instance, order+duplicates preserved), which Core's import
seeds as unconsumed packs rows in the same transaction. Closes the economy
import gap so a migrated profile's unopened packs become Core entitlements
(feeding purchasegroup/credits/userMassInfo). Idempotency unchanged (import
fingerprint). +1 test; 26 pass, clippy -D warnings clean.

openfut-import-fifa17/src/apply.rs

@@ -105,6 +105,15 @@ pub struct GenericImportRequest {
     pub owned: Vec<GenericOwned>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub squad: Option<GenericSquad>,
+    #[serde(skip_serializing_if = "Vec::is_empty")]
+    pub entitlements: Vec<GenericEntitlement>,
+}
+
+/// One unconsumed entitlement to seed into Core (a source `unopenedPackIds`
+/// entry). `definition_id` is the pack id as text; Core stores it verbatim.
+#[derive(Debug, Serialize)]
+pub struct GenericEntitlement {
+    pub definition_id: String,
 }
 
 /// One preserved (opaque OwnedItemId ↔ source wire id) mapping to install into
@@ -231,6 +240,13 @@ pub fn plan_apply(
         },
         owned,
         squad,
+        entitlements: report
+            .unopened_pack_ids
+            .iter()
+            .map(|id| GenericEntitlement {
+                definition_id: id.to_string(),
+            })
+            .collect(),
     };
 
     Ok(ApplyPlan {