Remove sexually explicit typos rule and add migration for masked call participants

src/database/migrations/0004_participant_is_masked.cql

@@ -3,4 +3,4 @@ ALTER TABLE payphone.participants ADD is_masked BOOLEAN;
 CREATE MATERIALIZED VIEW IF NOT EXISTS payphone.participants_by_user_id AS
     SELECT user_id, call_id, channel_id FROM payphone.participants
     WHERE user_id IS NOT NULL AND call_id IS NOT NULL AND channel_id IS NOT NULL
-    PRIMARY KEY (user_id, call_id);
+    PRIMARY KEY (user_id, call_id, channel_id);