Add GET /api/v1/logs endpoint to query application logs stored in OpenSearch with filters for application, agent, level, time range, and text search. Wire up the AgentInstance LogViewer with real data and an EventFeed-style toolbar (search input + level filter pills). Fix agent events timeline autoscroll by reversing the DESC-ordered events so newest entries appear at the bottom where EventFeed autoscrolls to. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>