fix(config): fail fast on invalid operation-day zone

运营日时区只认 PARAM:msgx.operation-day.zone：JobRunner、HistorySweepJob、JdbcSnapshotLogRepository.purgeBefore 改走注入的 OperationDayProps；ScheduleProcessor/AdftProcessor 删除「非法值回退字面量」；新增 @Context 启动自检 OperationDayZoneCheck，配置错位在启动时暴露。

验证：./gradlew test 126 tests / 0 fail（新增 OperationDayPropsTest 覆盖合法解析与非法即失败）。

src/main/kotlin/com/gzzn/omms/msgexchange/processing/DynamicProcessors.kt

@@ -133,7 +133,7 @@ class AdftProcessor(
     private val clock: Clock,
 ) {
     private val opDay = OperationDayCalculator(
-        zone = runCatching { ZoneId.of(operationDayProps.zone) }.getOrElse { ZoneId.of("Asia/Shanghai") },
+        zone = operationDayProps.zoneId(),
         cutoffHour = operationDayProps.cutoffHour,
     )
 

src/main/kotlin/com/gzzn/omms/msgexchange/processing/ScheduleProcessor.kt

@@ -69,7 +69,7 @@ class ScheduleProcessor(
     private val mapper: ObjectMapper,
     private val clock: Clock,
 ) {
-    private val zone: ZoneId = runCatching { ZoneId.of(operationDayProps.zone) }.getOrElse { ZoneId.of("Asia/Shanghai") }
+    private val zone: ZoneId = operationDayProps.zoneId()
     private val opDay = OperationDayCalculator(
         zone = zone,
         cutoffHour = operationDayProps.cutoffHour,