merged from gramsrv upstream

deploy/migrations/20260901000014_peer_identity_read_model.up.sql

@@ -0,0 +1,68 @@
+-- Viewer-independent peer decorations are projected on every peer-bearing RPC
+-- response. Keep one durable version token for username registry vectors and
+-- third-party bot-verification marks so positive and negative L1 entries can be
+-- reused without one PostgreSQL query per response page.
+
+CREATE OR REPLACE FUNCTION public.telesrv_bump_peer_identity(
+    p_peer_type text,
+    p_peer_id bigint
+) RETURNS void
+LANGUAGE plpgsql
+AS $$
+BEGIN
+    IF COALESCE(p_peer_id, 0) = 0 OR p_peer_type NOT IN ('user', 'channel') THEN
+        RETURN;
+    END IF;
+
+    PERFORM public.telesrv_bump_read_model_version(
+        'peer_identity', 0, p_peer_type, p_peer_id
+    );
+END;
+$$;
+
+CREATE OR REPLACE FUNCTION public.telesrv_notify_peer_identity_row()
+RETURNS trigger
+LANGUAGE plpgsql
+AS $$
+BEGIN
+    IF TG_OP = 'DELETE' THEN
+        PERFORM public.telesrv_bump_peer_identity(OLD.peer_type, OLD.peer_id);
+        RETURN OLD;
+    END IF;
+
+    IF TG_OP = 'UPDATE'
+       AND (OLD.peer_type, OLD.peer_id) IS DISTINCT FROM (NEW.peer_type, NEW.peer_id) THEN
+        PERFORM public.telesrv_bump_peer_identity(OLD.peer_type, OLD.peer_id);
+    END IF;
+    PERFORM public.telesrv_bump_peer_identity(NEW.peer_type, NEW.peer_id);
+    RETURN NEW;
+END;
+$$;
+
+DROP TRIGGER IF EXISTS peer_usernames_peer_identity_changed ON public.peer_usernames;
+CREATE TRIGGER peer_usernames_peer_identity_changed
+AFTER INSERT OR UPDATE OR DELETE ON public.peer_usernames
+FOR EACH ROW EXECUTE FUNCTION public.telesrv_notify_peer_identity_row();
+
+DROP TRIGGER IF EXISTS custom_verifications_peer_identity_changed ON public.custom_verifications;
+CREATE TRIGGER custom_verifications_peer_identity_changed
+AFTER INSERT OR UPDATE OR DELETE ON public.custom_verifications
+FOR EACH ROW EXECUTE FUNCTION public.telesrv_notify_peer_identity_row();
+
+-- Seed every durable peer, including peers with no registry row/mark. This is
+-- what makes an empty result a versioned negative fact rather than a TTL guess.
+INSERT INTO public.read_model_versions (
+    model, owner_user_id, peer_type, peer_id, version, hash, updated_at
+)
+SELECT 'peer_identity', 0, 'user', u.id, 1,
+       public.telesrv_random_read_model_hash(), now()
+FROM public.users u
+ON CONFLICT (model, owner_user_id, peer_type, peer_id) DO NOTHING;
+
+INSERT INTO public.read_model_versions (
+    model, owner_user_id, peer_type, peer_id, version, hash, updated_at
+)
+SELECT 'peer_identity', 0, 'channel', c.id, 1,
+       public.telesrv_random_read_model_hash(), now()
+FROM public.channels c
+ON CONFLICT (model, owner_user_id, peer_type, peer_id) DO NOTHING;