feat(routing): consolidate scheduling strategy configuration

apps/aether-gateway/src/routing/resolver.rs

@@ -95,6 +95,7 @@ pub(crate) fn resolve_gateway_static_default_routing_policy(
         scheduling_mode: default_policy.scheduling_mode,
         keep_priority_on_conversion: default_policy.keep_priority_on_conversion,
         sticky_key_attempts: default_policy.sticky_key_attempts,
+        execution_policy: default_policy.execution_policy,
         ranking_overlay: RankingOverlay::default(),
         mutation_plan: MutationPlan::default(),
         pool_policy_overrides: BTreeMap::new(),
@@ -108,8 +109,10 @@ fn static_default_policy_fields(
     let Some(object) = config_json.as_object() else {
         return Ok(None);
     };
-    if !routing_array_field_is_missing_or_empty(object, "allowed_models")
-        || !routing_array_field_is_missing_or_empty(object, "model_policies")
+    // A strategy's default policy applies to every model. Only model policies
+    // and rules require the request-context-aware resolver; unknown legacy
+    // fields (including the removed group allowlist) are intentionally ignored.
+    if !routing_array_field_is_missing_or_empty(object, "model_policies")
         || !routing_array_field_is_missing_or_empty(object, "rules")
     {
         return Ok(None);
@@ -145,15 +148,47 @@ fn static_default_policy_fields(
             })?,
         None => DEFAULT_STICKY_KEY_ATTEMPTS,
     };
+    let enable_cf_heartbeat = routing_bool_field(
+        default_policy.get("enable_cf_heartbeat"),
+        "enable_cf_heartbeat",
+    )?;
+    // Older strategies stored separate image/text heartbeat flags. Treat
+    // either legacy flag as enabling the unified CF heartbeat setting while
+    // allowing newly saved strategies to use only the canonical key.
+    let legacy_image_heartbeat = routing_bool_field(
+        default_policy.get("enable_openai_image_sync_heartbeat"),
+        "enable_openai_image_sync_heartbeat",
+    )?;
+    let legacy_text_heartbeat = routing_bool_field(
+        default_policy.get("enable_standard_text_sync_heartbeat"),
+        "enable_standard_text_sync_heartbeat",
+    )?;
+    let execution_policy = aether_routing_core::RoutingExecutionPolicy {
+        enable_cf_heartbeat: enable_cf_heartbeat || legacy_image_heartbeat || legacy_text_heartbeat,
+        cyber_continue_failover: routing_bool_field(
+            default_policy.get("cyber_continue_failover"),
+            "cyber_continue_failover",
+        )?,
+    };
 
     Ok(Some(RoutingDefaultPolicy {
         priority_mode,
         scheduling_mode,
         keep_priority_on_conversion,
         sticky_key_attempts,
+        execution_policy,
     }))
 }
 
+fn routing_bool_field(value: Option<&Value>, field: &str) -> Result<bool, GatewayError> {
+    match value {
+        Some(value) => value
+            .as_bool()
+            .ok_or_else(|| invalid_routing_group_config(format!("{field} must be a boolean"))),
+        None => Ok(false),
+    }
+}
+
 fn routing_array_field_is_missing_or_empty(
     object: &serde_json::Map<String, Value>,
     key: &str,
@@ -201,7 +236,7 @@ mod tests {
                 "scheduling_mode": "load_balance",
                 "keep_priority_on_conversion": true
             },
-            "allowed_models": [],
+            "allowed_models": ["legacy-model"],
             "model_policies": [],
             "rules": []
         });

apps/aether-gateway/src/routing/selection.rs

@@ -8,6 +8,8 @@ pub(crate) const ROUTING_GROUP_HEADER: &str = "x-aether-scheduler-group";
 
 #[derive(Debug, Error, Clone, PartialEq, Eq)]
 pub(crate) enum GatewayRoutingSelectionError {
+    #[error("no enabled routing strategy is configured for this request")]
+    NoDefault,
     #[error("routing group was explicitly requested but was not found: {0}")]
     NotFound(String),
     #[error("routing group was explicitly requested but is not enabled: {0}")]
@@ -239,6 +241,7 @@ mod tests {
                 description: None,
                 enabled: true,
                 is_system_default: false,
+                sort_order: 0,
                 config_json: json!({}),
                 version: 1,
                 created_at: 1,
@@ -287,6 +290,7 @@ mod tests {
                 description: None,
                 enabled: true,
                 is_system_default: true,
+                sort_order: 0,
                 config_json: json!({}),
                 version: 1,
                 created_at: 1,
@@ -322,6 +326,7 @@ mod tests {
                 description: None,
                 enabled: true,
                 is_system_default: false,
+                sort_order: 0,
                 config_json: json!({}),
                 version: 1,
                 created_at: 1,
@@ -444,6 +449,7 @@ mod tests {
                 description: None,
                 enabled: false,
                 is_system_default: false,
+                sort_order: 0,
                 config_json: json!({}),
                 version: 1,
                 created_at: 1,
@@ -481,6 +487,7 @@ mod tests {
                 description: None,
                 enabled: true,
                 is_system_default: false,
+                sort_order: 0,
                 config_json: json!({}),
                 version: 1,
                 created_at: 1,