feat: show conversation content in usage logs

migrations/20260516000001_initial.sql

@@ -405,6 +405,9 @@ CREATE TABLE IF NOT EXISTS proxy_logs (
     client_app_name         TEXT,
     client_confidence       TEXT,
     billing_details         TEXT,
+    content_summary         TEXT,
+    request_content         TEXT,
+    response_content        TEXT,
     created_at              TEXT DEFAULT (datetime('now'))
 );
 

migrations/20260606000001_proxy_log_content.sql

@@ -0,0 +1,3 @@
+ALTER TABLE proxy_logs ADD COLUMN content_summary TEXT;
+ALTER TABLE proxy_logs ADD COLUMN request_content TEXT;
+ALTER TABLE proxy_logs ADD COLUMN response_content TEXT;