feat: track official versions and import resources

Persist official version-state, extend CAS/ResourceRepository import classification, and add offline catalog and failure regression fixtures.

Fixes #13

Fixes #12

Fixes #8

adapters/src/official/game_main_config.rs

@@ -114,7 +114,7 @@ fn parse_obfuscated_game_main_config(bytes: &[u8]) -> Result<YostarJpGameMainCon
 }
 
 fn decrypt_inferred_ascii_json(bytes: &[u8]) -> Result<String, String> {
-    if bytes.len() % 2 != 0 {
+    if !bytes.len().is_multiple_of(2) {
         return Err("Obfuscated GameMainConfig byte length is not UTF-16LE aligned".to_string());
     }
 
@@ -288,7 +288,7 @@ fn xor_bytes(bytes: &mut [u8], key: &[u8]) {
 }
 
 fn utf16le_to_string(bytes: &[u8]) -> Result<String, String> {
-    if bytes.len() % 2 != 0 {
+    if !bytes.len().is_multiple_of(2) {
         return Err("GameMainConfig decrypted byte length is not UTF-16LE aligned".into());
     }
 
@@ -454,7 +454,7 @@ mod tests {
 
     fn encrypt_utf16le_xor(value: &str, key: &[u8]) -> Vec<u8> {
         let mut utf16 = utf16le_bytes(value);
-        xor_bytes(&mut utf16, &key);
+        xor_bytes(&mut utf16, key);
         utf16
     }