Create the sessions table

sql/init.sql

@@ -5,3 +5,5 @@ CREATE DATABASE chatrpg;
 \ir users.sql
 \ir purchases.sql
 \ir games.sql
+\ir characters.sql
+\ir sessions.sql

sql/sessions.sql

@@ -0,0 +1,7 @@
+CREATE TABLE IF NOT EXISTS sessions(
+    id UUID PRIMARY KEY,
+    game_id UUID NOT NULL REFERENCES games(id),
+    summary TEXT NULL,
+    started_at TIMESTAMPTZ NOT NULL,
+    ended_at TIMESTAMPTZ NULL
+);