add user_pauses table to db

nomen/db.py

@@ -52,9 +52,16 @@ CREATE TABLE user_blocks (
     PRIMARY KEY (user_id, target)
 );
 
+CREATE TABLE user_pauses (
+    user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE,
+    guild_id INTEGER NOT NULL,
+    PRIMARY KEY (user_id, guild_id)
+);
+
 CREATE INDEX keywords_index ON keywords(user_id);
 CREATE INDEX user_ignores_index ON user_ignores(user_id);
 CREATE INDEX user_blocks_index ON user_blocks(user_id);
+CREATE INDEX user_pauses_index ON user_pauses(user_id);
 """