perf(species): seed the bundled catalog only once per version

Skip the ~1.5 MB catalog parse and the table scan on every launch — the
main startup cost. `seedBundledIfNeeded` re-seeds only when the recorded
version differs from `speciesCatalogVersion`, writing the version after
the seed commits so an interrupted seed retries next launch.

Adds `parseSpeciesCatalogVersion` and a test keeping the constant in sync
with the asset's `version` field.

apps/app_seeds/lib/data/species_catalog.dart

@@ -31,3 +31,16 @@ Future<List<SpeciesSeed>> loadBundledSpecies() async {
   final jsonString = await rootBundle.loadString(_catalogAsset);
   return parseSpeciesCatalog(jsonString);
 }
+
+/// Version of the bundled catalog, mirrored from the asset's `version` field
+/// (written by `tool/gen_species_catalog.dart`). A test asserts the two stay in
+/// sync. The app records the version it last seeded and skips the ~1.5 MB parse
+/// and the table scan in [SpeciesRepository.seedBundled] on every subsequent
+/// launch — so bumping this (alongside the asset) is what triggers a one-time
+/// re-seed after the catalog changes.
+const int speciesCatalogVersion = 3;
+
+/// Reads just the `version` field from a catalog JSON string. Used by the sync
+/// test to keep [speciesCatalogVersion] aligned with the asset.
+int parseSpeciesCatalogVersion(String jsonString) =>
+    (jsonDecode(jsonString) as Map<String, dynamic>)['version'] as int;