cloudflare[minor]: Adds Cloudflare D1 checkpointer #14907

Job	Run time
Check linting	6m 14s
platform-compatibility (ubuntu-latest)	2m 42s
platform-compatibility (windows-latest)	19m 28s
platform-compatibility (macos-latest)	6m 42s
test-exports / exports-cf	6m 25s
test-exports / exports-cjs	6m 43s
test-exports / exports-esbuild	6m 18s
test-exports / exports-esm	6m 29s
test-exports / exports-tsc	6m 0s
test-exports / exports-vercel	7m 34s
test-exports / exports-vite	6m 14s
	1h 20m 49s

Provide feedback