Minor: Set completion tracking (#19)

core/include/ccm/games/digibattle99/DigiBattle99SetSource.hpp

@@ -3,12 +3,15 @@
 // DigiBattle99SetSource: ISetSource for Digimon Digi-Battle (1999 English).
 // digimoncard.io has no dedicated sets endpoint; we derive unique pack names
 // from a bulk search.php call scoped to series=Digimon Digi-Battle Card Game.
+// The same payload also builds the set-completion catalog (parseCatalog).
 
+#include "ccm/domain/DigiBattle99SetCatalog.hpp"
 #include "ccm/games/IGameModule.hpp"
 #include "ccm/ports/IHttpClient.hpp"
 
 #include <string>
 #include <string_view>
+#include <vector>
 
 namespace ccm {
 
@@ -20,12 +23,21 @@ public:
 
     static constexpr const char* kSeries = "Digimon Digi-Battle Card Game";
 
+    struct FetchWithCatalog {
+        std::vector<Set>         sets;
+        DigiBattle99SetCatalog   catalog;
+    };
+
     explicit DigiBattle99SetSource(IHttpClient& http);
 
     Result<std::vector<Set>> fetchAll() override;
 
-    // Pure parser exposed for unit testing without a network round-trip.
+    // One HTTP round-trip producing both the set list and the pack catalog.
+    Result<FetchWithCatalog> fetchAllWithCatalog();
+
+    // Pure parsers exposed for unit testing without a network round-trip.
     static Result<std::vector<Set>> parseResponse(const std::string& body);
+    static Result<DigiBattle99SetCatalog> parseCatalog(const std::string& body);
 
     // Stable Set.id from a pack display name (ASCII lower, non-alnum -> '-').
     static std::string slugifyPackName(std::string_view packName);