*VRFS-98 - completed

manifest

@@ -21,3 +21,4 @@ user_authorizations.sql
 music_session_all_params.sql
 as_musician.sql
 bootstrap_users_v3.sql
+join_request.sql

up/join_request.sql

@@ -0,0 +1,12 @@
+CREATE TABLE join_requests (
+    id VARCHAR(64) PRIMARY KEY DEFAULT uuid_generate_v4(),
+    user_id VARCHAR(64) REFERENCES users(id) ON DELETE CASCADE,
+    music_session_id VARCHAR(64) REFERENCES music_sessions(id) ON DELETE CASCADE,
+    text VARCHAR(2000),
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+ALTER TABLE join_requests ADD CONSTRAINT user_music_session_uniqkey UNIQUE (user_id, music_session_id);
+
+ALTER TABLE invitations ADD COLUMN join_request_id VARCHAR(64) REFERENCES join_requests(id) ON DELETE CASCADE;