merged from gramsrv upstream

deploy/migrations/20260901000015_story_projection_sparse_read_models.down.sql

@@ -0,0 +1,43 @@
+DROP TRIGGER IF EXISTS users_story_projection_versions_changed ON public.users;
+DROP TRIGGER IF EXISTS channels_story_projection_version_changed ON public.channels;
+DROP TRIGGER IF EXISTS telesrv_stories_story_peer_read_model ON public.stories;
+DROP TRIGGER IF EXISTS telesrv_story_hidden_peers_story_peer_read_model ON public.story_hidden_peers;
+
+DROP FUNCTION IF EXISTS public.telesrv_maintain_user_story_projection_versions();
+DROP FUNCTION IF EXISTS public.telesrv_maintain_channel_story_projection_version();
+DROP FUNCTION IF EXISTS public.telesrv_notify_story_row_read_models();
+DROP FUNCTION IF EXISTS public.telesrv_notify_story_hidden_row_read_models();
+DROP FUNCTION IF EXISTS public.telesrv_bump_story_hidden_list(bigint);
+DROP FUNCTION IF EXISTS public.telesrv_bump_story_peer(text, bigint);
+
+CREATE OR REPLACE FUNCTION public.telesrv_notify_story_peer_read_model()
+RETURNS trigger
+LANGUAGE plpgsql
+AS $$
+DECLARE
+    o_type text;
+    o_id bigint;
+BEGIN
+    IF TG_OP = 'DELETE' THEN
+        o_type := OLD.owner_peer_type;
+        o_id := OLD.owner_peer_id;
+    ELSE
+        o_type := NEW.owner_peer_type;
+        o_id := NEW.owner_peer_id;
+    END IF;
+    PERFORM public.telesrv_bump_read_model_version('story_peer', 0, o_type, o_id);
+    RETURN NULL;
+END;
+$$;
+
+CREATE TRIGGER telesrv_stories_story_peer_read_model
+AFTER INSERT OR UPDATE OR DELETE ON public.stories
+FOR EACH ROW EXECUTE FUNCTION public.telesrv_notify_story_peer_read_model();
+
+CREATE TRIGGER telesrv_story_hidden_peers_story_peer_read_model
+AFTER INSERT OR UPDATE OR DELETE ON public.story_hidden_peers
+FOR EACH ROW EXECUTE FUNCTION public.telesrv_notify_story_peer_read_model();
+
+DELETE FROM public.read_model_versions WHERE model = 'story_hidden_list';
+-- story_peer rows seeded for peers without stories are harmless under the
+-- previous contract and are retained so rollback cannot erase real versions.