feat: add invite code validity controls

- Add invite code starts/expires fields across contracts, API, Spacetime bindings, and admin UI
- Enforce pending/expired invite code redemption behavior and expose admin status
- Add admin write-operation confirmation guard and documentation
- Add invite code contract/runtime tests

server-rs/crates/module-runtime/src/errors.rs

@@ -52,6 +52,7 @@ pub enum RuntimeProfileFieldError {
     InvalidRedeemCodeReward,
     InvalidRedeemCodeMaxUses,
     InvalidInviteCodeMetadata,
+    InvalidInviteCodeValidityWindow,
     MissingTaskId,
     MissingTaskTitle,
     MissingTaskEventKey,
@@ -59,6 +60,7 @@ pub enum RuntimeProfileFieldError {
     MissingTrackingScopeId,
     InvalidTaskCycle,
     InvalidTaskScopeKind,
+    UnsupportedProfileTaskScopeKind,
     InvalidTaskThreshold,
     InvalidTaskReward,
     TaskDisabled,
@@ -77,6 +79,7 @@ pub enum RuntimeProfileFieldError {
         actual_session_id: String,
     },
     NonPersistentRuntimeSnapshot,
+    InvalidAnalyticsCalendarDate,
 }
 
 impl std::fmt::Display for RuntimeProfileFieldError {
@@ -98,6 +101,7 @@ impl std::fmt::Display for RuntimeProfileFieldError {
             Self::InvalidInviteCodeMetadata => {
                 f.write_str("邀请码 metadata 必须是合法 JSON object")
             }
+            Self::InvalidInviteCodeValidityWindow => f.write_str("邀请码开始时间不能晚于截止时间"),
             Self::MissingTaskId => f.write_str("profile_task.task_id 不能为空"),
             Self::MissingTaskTitle => f.write_str("profile_task.title 不能为空"),
             Self::MissingTaskEventKey => f.write_str("profile_task.event_key 不能为空"),
@@ -105,6 +109,9 @@ impl std::fmt::Display for RuntimeProfileFieldError {
             Self::MissingTrackingScopeId => f.write_str("tracking_event.scope_id 不能为空"),
             Self::InvalidTaskCycle => f.write_str("profile_task.cycle 无效"),
             Self::InvalidTaskScopeKind => f.write_str("profile_task.scope_kind 无效"),
+            Self::UnsupportedProfileTaskScopeKind => {
+                f.write_str("个人任务 scope_kind 首版仅支持 user")
+            }
             Self::InvalidTaskThreshold => f.write_str("profile_task.threshold 必须大于 0"),
             Self::InvalidTaskReward => f.write_str("profile_task.reward_points 必须大于 0"),
             Self::TaskDisabled => f.write_str("任务已停用"),
@@ -130,6 +137,9 @@ impl std::fmt::Display for RuntimeProfileFieldError {
             Self::NonPersistentRuntimeSnapshot => {
                 f.write_str("预览或测试运行态不能创建正式 checkpoint")
             }
+            Self::InvalidAnalyticsCalendarDate => {
+                f.write_str("analytics_date_dimension.calendar_date 必须是合法 YYYY-MM-DD 日期")
+            }
         }
     }
 }