fix(fifa17): carry observed rareflag so special cards render as specials

shape_item hardcoded rareflag=1, so all 1949 cards shaped as basic rare gold
regardless of type; informs/specials lost their card art. The dev fixture is
base-only, so this was invisible until the real profile (10 distinct rareflag
values) exposed it on .105.

rareflag is definition-level FIFA identity metadata OBSERVED from the profile
(the raw wire integer, never a guessed marketing label), so it lives in the
FIFA catalog like asset_id/version, not in generic Core:
- ObservedDefinition.rareflag + emitted into the production catalog entry.
- Fifa17CardCatalog RawCard/Fifa17CardIdentity gain rareflag (default 1 when a
  base-only catalog omits it, preserving prior wire behaviour).
- Fifa17Identity.rareflag; host resolver populates it from the catalog.
- shape_item emits id.rareflag instead of a hardcoded 1.

Verified on the real staged /club: wire rareflag distribution == source exactly
(0 per-item mismatches across 1949; e.g. rareflag 3 x591, 24 x302, 21 x256).
adapter 111 + host 24 + importer 25 tests green; clippy -D clean. rareflag lives
in the host catalog, not Core, so no re-import was needed.

openfut-utas-host/src/lib.rs

@@ -552,6 +552,7 @@ impl ItemIdentityResolver for Fifa17IdentityResolver {
             item_id: wire as u32,
             asset_id: ident.asset_id,
             resource_id: ident.resource_id,
+            rareflag: ident.rareflag,
         })
     }
 }