added integration tests and added message with attachments

db/init.sql

@@ -48,7 +48,7 @@ CREATE TABLE IF NOT EXISTS room_invite_ (
 
 CREATE TABLE IF NOT EXISTS message_ (
   id BIGSERIAL PRIMARY KEY,
-  uuid UUID NOT NULL,
+  uuid UUID UNIQUE NOT NULL,
   sender INT REFERENCES user_(id) NOT NULL,
   room INT REFERENCES room_(id) NOT NULL,
   message_type VARCHAR(32) NOT NULL,
@@ -56,6 +56,14 @@ CREATE TABLE IF NOT EXISTS message_ (
   sent_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
 );
 
+CREATE TABLE message_attachment_ (
+    id SERIAL PRIMARY KEY,
+    uuid UUID NOT NULL UNIQUE,
+    message_uuid UUID NOT NULL REFERENCES message_(uuid),
+    file_type VARCHAR(20) NOT NULL,
+    file_name TEXT NOT NULL
+);
+
 CREATE TABLE ws_token_ (
   token TEXT PRIMARY KEY,
   expires_at TIMESTAMPTZ NOT NULL
@@ -64,6 +72,7 @@ CREATE TABLE ws_token_ (
 -- ==== INDICES ====
 CREATE INDEX idx_message_room_sent_at ON message_ (room, sent_at);
 CREATE UNIQUE INDEX idx_membership_user_room ON membership_ (user_id, room) INCLUDE (last_read_at);
+CREATE INDEX idx_attachment_message ON message_attachment_(message_uuid);
 
 -- Timestamp creation
 -- CREATE OR REPLACE FUNCTION create_notification_timestamp()