Fix P1 Rust: remove all unused imports, variables, and fields across api/worker bins

products/01-llm-cost-router/src/api/handler.rs

@@ -2,7 +2,7 @@ use axum::{
     extract::{Path, Query, State},
     http::{HeaderMap, StatusCode},
     response::IntoResponse,
-    routing::{get, post, put, delete},
+    routing::{get, put, delete},
     Json, Router,
 };
 use serde::{Deserialize, Serialize};
@@ -16,7 +16,7 @@ pub struct ApiState {
     pub auth: Arc<dyn AuthProvider>,
     pub pg_pool: sqlx::PgPool,
     pub ts_pool: sqlx::PgPool,
-    pub config: Arc<AppConfig>,
+    pub _config: Arc<AppConfig>,
 }
 
 pub fn create_api_router(state: Arc<ApiState>) -> Router {
@@ -47,7 +47,7 @@ async fn health() -> &'static str { "ok" }
 #[derive(Deserialize)]
 pub struct TimeRange {
     pub from: Option<String>,
-    pub to: Option<String>,
+    pub _to: Option<String>,
     pub interval: Option<String>, // "hour" or "day"
 }
 
@@ -76,7 +76,7 @@ async fn get_analytics_summary(
     Query(range): Query<TimeRange>,
 ) -> Result<Json<AnalyticsSummary>, ApiError> {
     let auth = state.auth.authenticate(&headers).await?;
-    let from = range.from.unwrap_or_else(|| "now() - interval '7 days'".to_string());
+    let _from = range.from.unwrap_or_else(|| "now() - interval '7 days'".to_string());
 
     let row = sqlx::query_as::<_, (i64, f64, f64, f64, i32, i32, i64, i64, i64)>(
         "SELECT
@@ -494,7 +494,6 @@ async fn upsert_provider(
         .unwrap_or_else(|_| vec![0u8; 32]);
 
     use aes_gcm::{Aes256Gcm, KeyInit, aead::Aead};
-    use aes_gcm::aead::OsRng;
     use aes_gcm::Nonce;
 
     let cipher = Aes256Gcm::new_from_slice(&key_bytes)