Описание изменений

backend/db/migrations/004_conversations.sql

@@ -0,0 +1,10 @@
+CREATE TABLE IF NOT EXISTS conversations (
+  id SERIAL PRIMARY KEY,
+  user_id INTEGER REFERENCES users(id) ON DELETE CASCADE,
+  title VARCHAR(255),
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE INDEX IF NOT EXISTS idx_conversations_user_id ON conversations(user_id);
+CREATE INDEX IF NOT EXISTS idx_conversations_created_at ON conversations(created_at);