feat: add redis cache and fanout support

docs/sql/IM-SeqId-BIGINT与Redis缓存改造SQL.sql

@@ -0,0 +1,12 @@
+-- IM SeqId BIGINT upgrade for existing MySQL tenant databases.
+-- New schemas have been updated in server/db/mysql/adapter.go and group_schema.go.
+
+ALTER TABLE im_topics MODIFY seqid BIGINT NOT NULL DEFAULT 0;
+ALTER TABLE im_subscriptions MODIFY recvseqid BIGINT DEFAULT 0;
+ALTER TABLE im_subscriptions MODIFY readseqid BIGINT DEFAULT 0;
+ALTER TABLE im_messages MODIFY seqid BIGINT NOT NULL;
+ALTER TABLE im_message_revisions MODIFY seqid BIGINT NOT NULL;
+ALTER TABLE im_favorites MODIFY source_seq BIGINT NOT NULL;
+ALTER TABLE im_abuse_reports MODIFY target_seq BIGINT NOT NULL DEFAULT 0;
+ALTER TABLE im_call_records MODIFY seq_id BIGINT NOT NULL;
+ALTER TABLE im_group_files MODIFY source_seq BIGINT NOT NULL DEFAULT 0;