feat: 配置列表分页与钉钉机器人分钟级排队限流

统一 sources/templates/channels/rules 列表为分页响应，避免配置增多时全量返回；按钉钉 access_token 限制每分钟发送并在超限时等待下一分钟，降低触发官方封禁风险。

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

Makefile

@@ -1,4 +1,4 @@
-.PHONY: build run test docker-build docker-up docker-down migrate-up migrate-down
+.PHONY: build run test test-e2e docker-build docker-up docker-down migrate-up migrate-down
 
 build:
 	go build -o bin/server ./cmd/server
@@ -9,6 +9,9 @@ run:
 test:
 	go test ./internal/... -v -count=1
 
+test-e2e:
+	go test -tags e2e ./test/e2e/ -v -count=1 -timeout 2m
+
 docker-build:
 	docker build -t notification-service .