feat(fifa17): project owned kits with active home/away designation

Closes the server side of the FUT kit selector. Ownership stays generic in
Core (submodule bump: club_kit_assignments + GET/PUT /club/kits); this
commit adds the FIFA17 representation, the host projection and importer
support.

adapter:
* ContentKind::Kit ("kit") so kits are classified alongside player/staff/
  consumable instead of being mistaken for 0-rated players.
* Fifa17CardIdentity carries card_asset_id and team_id; RawCard keeps both
  optional because the emitted catalog writes null for non-kit definitions.
* shape_kit_item emits only the fields the client's kit path reads
  (id/resourceId/assetId/cardassetid/cardsubtypeid/itemState/owners/
  untradeable/teamid) — no attributeList, no itemType.
* itemState on the wire is the STRING token activeHomeKit/activeAwayKit;
  the 101/102 integers are the client's post-deserialisation runtime enum
  (item+0x5c) and are never emitted.
* club_stats S_KITS (0x28) now counts owned kits instead of a hard zero.

host:
* CoreKitAssignments + CoreAccess::get_active_kits (GET /club/kits),
  defaulting to no active kits so a Core without the endpoint degrades
  instead of fabricating a designation.
* handle_club classifies type=player|kit, rejects any other type with an
  empty page and outcome=unsupported_type, and now always fetches
  unpaginated from Core: kind and transfer-pile membership are host-side
  concepts Core cannot express, so filtering and pagination must both
  happen after shaping or pages come back short.

importer:
* ItemClass::Kit (cardsubtypeid == 9 and resourceId in 6_300_000..=6_400_654),
  kit counts/balances, and card_asset_id/team_id carried into the emitted
  catalog and manifest.
* a kit group missing cardassetid == 35 or teamid is DEFERRED
  (missing_kit_render_metadata) rather than defaulted; conflicting render
  metadata across instances defers as render_metadata_conflict.

staging: sold-staging-up.py seeds two owned kits (6300006 home / 6400003
away, team 21) plus both active designations so the projection can be
verified over HTTP before involving the client.

openfut-adapter-fifa17/src/fut/owned_query.rs

@@ -48,6 +48,9 @@ use std::collections::HashMap;
 /// fields are FIFA entity ids that MUST be resolved before reaching Core.
 #[derive(Debug, Default, Clone, PartialEq, Eq)]
 pub struct Fifa17ClubQuery {
+    /// Requested FIFA item family (`player`, `kit`, …). Adapter-owned: Core has
+    /// no FIFA content taxonomy, so the host applies this filter locally.
+    pub item_type: Option<String>,
     /// Quality filter: `any` (default, always present) or `gold`.
     pub level: Option<String>,
     /// "Special" filter (`SP`). Semantics UNKNOWN — never applied.
@@ -115,6 +118,7 @@ pub fn parse_club_query(query: &str) -> Fifa17ClubQuery {
             None => (pair, String::new()),
         };
         match k {
+            "type" => out.item_type = Some(v),
             "level" => out.level = Some(v),
             "rare" => out.rare = Some(v),
             "position" => out.position = Some(v),
@@ -325,6 +329,7 @@ mod tests {
         assert_eq!(
             q,
             Fifa17ClubQuery {
+                item_type: Some("player".into()),
                 level: Some("gold".into()),
                 rare: None,
                 position: Some("ST".into()),