Initial open source release

deploy/migrations/0036_channel_discussion_links.up.sql

@@ -0,0 +1,8 @@
+-- 0036_channel_discussion_links: persist bidirectional broadcast <-> discussion group links.
+
+ALTER TABLE channels
+    ADD COLUMN IF NOT EXISTS linked_chat_id BIGINT NOT NULL DEFAULT 0;
+
+CREATE INDEX IF NOT EXISTS channels_linked_chat_idx
+    ON channels (linked_chat_id)
+    WHERE linked_chat_id <> 0 AND NOT deleted;