feat(health): добавить Globalping и мультивыбор источников проб

Несколько источников проб сразу и правило агрегации на сервисе вместо XOR Local/Cloudflare.

Co-authored-by: Cursor <cursoragent@cursor.com>

packages/db/migrations/023_health_providers.sql

@@ -0,0 +1,21 @@
+ALTER TABLE service_bindings ADD COLUMN health_check_providers TEXT;
+ALTER TABLE service_bindings ADD COLUMN health_check_aggregate TEXT NOT NULL DEFAULT 'majority';
+UPDATE service_bindings
+SET health_check_providers = CASE
+  WHEN health_check_provider = 'cloudflare' THEN '["cloudflare"]'
+  ELSE '["local"]'
+END
+WHERE health_check_providers IS NULL;
+
+ALTER TABLE service_groups ADD COLUMN health_check_providers TEXT;
+ALTER TABLE service_groups ADD COLUMN health_check_aggregate TEXT NOT NULL DEFAULT 'majority';
+UPDATE service_groups
+SET health_check_providers = CASE
+  WHEN health_check_provider = 'cloudflare' THEN '["cloudflare"]'
+  ELSE '["local"]'
+END
+WHERE health_check_providers IS NULL;
+
+ALTER TABLE app_settings ADD COLUMN globalping_token TEXT;
+ALTER TABLE app_settings ADD COLUMN globalping_locations TEXT;
+ALTER TABLE app_settings ADD COLUMN globalping_limit INTEGER;