fix: use proper base type for flutter parse exceptions

backend/data/src/main/kotlin/io/tolgee/exceptions/ImportCannotParseFileException.kt

@@ -1,4 +1,4 @@
 package io.tolgee.exceptions
 
-class ImportCannotParseFileException(filename: String, causeMessage: String?, cause: Exception? = null) :
+open class ImportCannotParseFileException(filename: String, causeMessage: String?, cause: Exception? = null) :
   BadRequestException(io.tolgee.constants.Message.CANNOT_PARSE_FILE, listOf(filename, causeMessage ?: ""), cause)

backend/data/src/main/kotlin/io/tolgee/formats/flutter/in/FlutterArbFileParseException.kt

@@ -1,3 +1,6 @@
 package io.tolgee.formats.flutter.`in`
 
-class FlutterArbFileParseException(cause: Exception) : RuntimeException("Cannot parse arb file", cause)
+import io.tolgee.exceptions.ImportCannotParseFileException
+
+class FlutterArbFileParseException(filename: String, cause: Exception) :
+  ImportCannotParseFileException(filename, "Cannot parse arb file", cause)

backend/data/src/main/kotlin/io/tolgee/formats/flutter/in/FlutterArbFileParser.kt

@@ -10,12 +10,8 @@ class FlutterArbFileParser(
   private val objectMapper: ObjectMapper,
 ) {
   fun parse(): FlutterArbModel {
-    try {
-      val data = objectMapper.readValue<Map<String, Any>>(bytes)
-      return parseArbData(data)
-    } catch (e: Exception) {
-      throw FlutterArbFileParseException(e)
-    }
+    val data = objectMapper.readValue<Map<String, Any>>(bytes)
+    return parseArbData(data)
   }
 
   private fun parseArbData(data: Map<String, Any>): FlutterArbModel {

backend/data/src/main/kotlin/io/tolgee/formats/flutter/in/FlutterArbFileProcessor.kt

@@ -33,7 +33,11 @@ class FlutterArbFileProcessor(
   }
 
   private val parsed by lazy {
-    FlutterArbFileParser(context.file.data, objectMapper).parse()
+    try {
+      FlutterArbFileParser(context.file.data, objectMapper).parse()
+    } catch (e: Exception) {
+      throw FlutterArbFileParseException(context.file.name, e)
+    }
   }
 
   fun convertMessage(text: String?): MessageConvertorResult {