refactor: 大规模模块拆分与代码精简，新增 ai-pipeline/data-contracts 独立 crate

- 新增 aether-ai-pipeline 和 aether-data-contracts crate，将 pipeline 逻辑与数据契约从 gateway 中解耦
- 重构 admin handlers：拆分单体模块为 auth/billing/endpoint/features/model/observability/provider/system 等独立子模块
- 合并 chat/cli 重复代码路径：精简 conversion、finalize、planner 中的 sync/chat/cli 分支
- 重构 scheduler/executor/data 层，引入 facade 模式降低模块间耦合
- 移除冗余的 intent 模块，将 plan_fallback/policy/stream_path/sync_path 迁移至 executor
- 前端适配：调整 admin API 调用和 provider 模型测试对话框

crates/aether-scheduler-core/Cargo.toml

@@ -8,7 +8,7 @@ description = "Pure scheduler health and quota logic extracted from aether-gatew
 
 [dependencies]
 aether-contracts.workspace = true
-aether-data.workspace = true
+aether-data-contracts.workspace = true
 aether-wallet.workspace = true
 regex.workspace = true
 serde.workspace = true

crates/aether-scheduler-core/src/candidate.rs

@@ -1,9 +1,9 @@
 use std::collections::{BTreeMap, BTreeSet};
 
-use aether_data::repository::candidate_selection::StoredMinimalCandidateSelectionRow;
-use aether_data::repository::candidates::StoredRequestCandidate;
-use aether_data::repository::provider_catalog::StoredProviderCatalogKey;
-use aether_data::DataLayerError;
+use aether_data_contracts::repository::candidate_selection::StoredMinimalCandidateSelectionRow;
+use aether_data_contracts::repository::candidates::StoredRequestCandidate;
+use aether_data_contracts::repository::provider_catalog::StoredProviderCatalogKey;
+use aether_data_contracts::DataLayerError;
 
 #[derive(Debug, Clone, PartialEq, serde::Serialize)]
 pub struct SchedulerMinimalCandidateSelectionCandidate {
@@ -362,11 +362,13 @@ fn candidate_provider_key_health_score(
 mod tests {
     use std::collections::{BTreeMap, BTreeSet};
 
-    use aether_data::repository::candidate_selection::{
+    use aether_data_contracts::repository::candidate_selection::{
         StoredMinimalCandidateSelectionRow, StoredProviderModelMapping,
     };
-    use aether_data::repository::candidates::{RequestCandidateStatus, StoredRequestCandidate};
-    use aether_data::repository::provider_catalog::StoredProviderCatalogKey;
+    use aether_data_contracts::repository::candidates::{
+        RequestCandidateStatus, StoredRequestCandidate,
+    };
+    use aether_data_contracts::repository::provider_catalog::StoredProviderCatalogKey;
 
     use super::{
         auth_api_key_concurrency_limit_reached, build_minimal_candidate_selection,

crates/aether-scheduler-core/src/health.rs

@@ -1,5 +1,7 @@
-use aether_data::repository::candidates::{RequestCandidateStatus, StoredRequestCandidate};
-use aether_data::repository::provider_catalog::StoredProviderCatalogKey;
+use aether_data_contracts::repository::candidates::{
+    RequestCandidateStatus, StoredRequestCandidate,
+};
+use aether_data_contracts::repository::provider_catalog::StoredProviderCatalogKey;
 
 const FAILURE_COOLDOWN_WINDOW_SECS: u64 = 60;
 const FAILURE_COOLDOWN_THRESHOLD: usize = 2;
@@ -443,8 +445,10 @@ fn json_value_as_f64(value: &serde_json::Value) -> Option<f64> {
 
 #[cfg(test)]
 mod tests {
-    use aether_data::repository::candidates::{RequestCandidateStatus, StoredRequestCandidate};
-    use aether_data::repository::provider_catalog::StoredProviderCatalogKey;
+    use aether_data_contracts::repository::candidates::{
+        RequestCandidateStatus, StoredRequestCandidate,
+    };
+    use aether_data_contracts::repository::provider_catalog::StoredProviderCatalogKey;
 
     use super::{
         aggregate_provider_key_health_score, count_recent_active_requests_for_api_key,

crates/aether-scheduler-core/src/model.rs

@@ -1,9 +1,9 @@
 use std::collections::BTreeSet;
 
-use aether_data::repository::candidate_selection::{
+use aether_data_contracts::repository::candidate_selection::{
     StoredMinimalCandidateSelectionRow, StoredProviderModelMapping,
 };
-use aether_data::DataLayerError;
+use aether_data_contracts::DataLayerError;
 use regex::Regex;
 
 pub fn resolve_requested_global_model_name(

crates/aether-scheduler-core/src/provider.rs

@@ -1,7 +1,7 @@
 use std::collections::BTreeMap;
 
-use aether_data::repository::provider_catalog::StoredProviderCatalogProvider;
-use aether_data::repository::quota::StoredProviderQuotaSnapshot;
+use aether_data_contracts::repository::provider_catalog::StoredProviderCatalogProvider;
+use aether_data_contracts::repository::quota::StoredProviderQuotaSnapshot;
 use aether_wallet::{ProviderBillingType, ProviderQuotaSnapshot};
 
 pub fn should_skip_provider_quota(quota: &StoredProviderQuotaSnapshot, now_unix_secs: u64) -> bool {
@@ -46,8 +46,8 @@ pub fn build_provider_concurrent_limit_map(
 #[cfg(test)]
 mod tests {
     use super::{build_provider_concurrent_limit_map, should_skip_provider_quota};
-    use aether_data::repository::provider_catalog::StoredProviderCatalogProvider;
-    use aether_data::repository::quota::StoredProviderQuotaSnapshot;
+    use aether_data_contracts::repository::provider_catalog::StoredProviderCatalogProvider;
+    use aether_data_contracts::repository::quota::StoredProviderQuotaSnapshot;
 
     fn sample_provider(id: &str, concurrent_limit: Option<i32>) -> StoredProviderCatalogProvider {
         StoredProviderCatalogProvider::new(

crates/aether-scheduler-core/src/request_candidate.rs

@@ -1,5 +1,5 @@
 use aether_contracts::{ExecutionError, ExecutionPlan};
-use aether_data::repository::candidates::{
+use aether_data_contracts::repository::candidates::{
     RequestCandidateStatus, StoredRequestCandidate, UpsertRequestCandidateRecord,
 };
 use serde_json::Value;
@@ -444,7 +444,9 @@ mod tests {
     use aether_contracts::{
         ExecutionError, ExecutionErrorKind, ExecutionPhase, ExecutionPlan, RequestBody,
     };
-    use aether_data::repository::candidates::{RequestCandidateStatus, StoredRequestCandidate};
+    use aether_data_contracts::repository::candidates::{
+        RequestCandidateStatus, StoredRequestCandidate,
+    };
     use serde_json::{json, Value};
 
     use super::{