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-adapter-fifa17/src/fut/catalog.rs

@@ -27,6 +27,9 @@ pub struct Fifa17CardIdentity {
     pub asset_id: u32,
     pub version: u8,
     pub resource_id: u32,
+    /// FIFA wire `rareflag` (rare/special card TYPE). Carried so specials render
+    /// as specials; observed metadata, not a guessed label.
+    pub rareflag: i64,
 }
 
 /// The FIFA 17 numeric namespace policy for owned-item wire ids.
@@ -108,6 +111,14 @@ struct RawCard {
     asset_id: u32,
     #[serde(default)]
     version: u8,
+    /// Absent in a base-only catalog → default 1 (rare), preserving prior wire
+    /// behaviour; the production catalog carries the observed value.
+    #[serde(default = "default_rareflag")]
+    rareflag: i64,
+}
+
+fn default_rareflag() -> i64 {
+    1
 }
 
 /// A loaded, validated FIFA 17 card-definition identity catalog.
@@ -153,6 +164,7 @@ impl Fifa17CardCatalog {
                     asset_id: rc.asset_id,
                     version: rc.version,
                     resource_id,
+                    rareflag: rc.rareflag,
                 },
             );
         }