Initial open source release

deploy/migrations/0027_channel_message_search_indexes.up.sql

@@ -0,0 +1,10 @@
+-- 0027_channel_message_search_indexes: bounded in-channel text search.
+--
+-- TDesktop uses messages.search with inputPeerChannel for in-chat search.
+-- Keep text lookup indexed on the single-copy channel_messages table.
+
+CREATE EXTENSION IF NOT EXISTS pg_trgm;
+
+CREATE INDEX IF NOT EXISTS channel_messages_body_trgm_idx
+    ON channel_messages USING gin (body gin_trgm_ops)
+    WHERE NOT deleted AND body <> '';