feat(agent): event timeline API, SSE stream, Coolify DDL, env template

- Add agent_session_events table + GET/POST events + SSE stream routes
- Build Agent tab: hydrate from events + EventSource while running
- entrypoint: create agent_sessions + agent_session_events on container start
- .env.example for AGENT_RUNNER_URL, AGENT_RUNNER_SECRET, DATABASE_URL

Made-with: Cursor

entrypoint.sh

@@ -53,6 +53,37 @@ pool.query(\`
     messages JSONB NOT NULL DEFAULT '[]',
     updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
   );
+  CREATE TABLE IF NOT EXISTS agent_sessions (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    project_id TEXT NOT NULL,
+    app_name TEXT NOT NULL,
+    app_path TEXT NOT NULL,
+    task TEXT NOT NULL,
+    plan JSONB,
+    status TEXT NOT NULL DEFAULT 'pending',
+    output JSONB NOT NULL DEFAULT '[]'::jsonb,
+    changed_files JSONB NOT NULL DEFAULT '[]'::jsonb,
+    error TEXT,
+    started_at TIMESTAMPTZ,
+    completed_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+  );
+  CREATE INDEX IF NOT EXISTS agent_sessions_project_idx ON agent_sessions (project_id, created_at DESC);
+  CREATE INDEX IF NOT EXISTS agent_sessions_status_idx ON agent_sessions (status);
+  CREATE TABLE IF NOT EXISTS agent_session_events (
+    id BIGSERIAL PRIMARY KEY,
+    session_id UUID NOT NULL REFERENCES agent_sessions(id) ON DELETE CASCADE,
+    project_id TEXT NOT NULL,
+    seq INT NOT NULL,
+    ts TIMESTAMPTZ NOT NULL,
+    type TEXT NOT NULL,
+    payload JSONB NOT NULL DEFAULT '{}'::jsonb,
+    client_event_id UUID UNIQUE,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    UNIQUE(session_id, seq)
+  );
+  CREATE INDEX IF NOT EXISTS agent_session_events_session_seq_idx ON agent_session_events (session_id, seq);
 \`).then(() => { console.log('App tables ready'); pool.end(); }).catch(e => { console.error('Table init error:', e.message); pool.end(); });
 "