feat: add routing profile scheduling policies

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

@@ -0,0 +1,54 @@
+use aether_routing_core::{
+    resolve_routing_policy, ResolvedRoutingPolicy, RoutingGroupConfig, RoutingPolicyInput,
+    RoutingRulePhase,
+};
+use http::StatusCode;
+use serde_json::Value;
+
+use crate::GatewayError;
+
+#[derive(Debug, Clone)]
+pub(crate) struct GatewayRoutingPolicyInput<'a> {
+    pub group_id: Option<&'a str>,
+    pub group_version: Option<i64>,
+    pub group_config_json: &'a Value,
+    pub selection_source: &'a str,
+    pub requested_model: &'a str,
+    pub resolved_model: &'a str,
+    pub api_format: &'a str,
+    pub user_id: Option<&'a str>,
+    pub api_key_id: Option<&'a str>,
+    pub headers: &'a Value,
+    pub body: &'a Value,
+    pub phase: RoutingRulePhase,
+}
+
+pub(crate) fn resolve_gateway_routing_policy(
+    input: GatewayRoutingPolicyInput<'_>,
+) -> Result<ResolvedRoutingPolicy, GatewayError> {
+    let config = serde_json::from_value::<RoutingGroupConfig>(input.group_config_json.clone())
+        .map_err(|err| GatewayError::Client {
+            status: StatusCode::BAD_REQUEST,
+            message: format!("invalid routing group config: {err}"),
+        })?;
+    resolve_routing_policy(
+        &config,
+        RoutingPolicyInput {
+            group_id: input.group_id,
+            group_version: input.group_version,
+            selection_source: input.selection_source,
+            requested_model: input.requested_model,
+            resolved_model: input.resolved_model,
+            api_format: input.api_format,
+            user_id: input.user_id,
+            api_key_id: input.api_key_id,
+            headers: input.headers,
+            body: input.body,
+            phase: input.phase,
+        },
+    )
+    .map_err(|err| GatewayError::Client {
+        status: StatusCode::BAD_REQUEST,
+        message: err.to_string(),
+    })
+}