Update Restate Server to v1.4.0

[pcholakov]

No description provided.

[Copilot]

Pull Request Overview

This PR updates the Restate constructs and end-to-end tests to target Restate Server v1.4.0, add support for inline image digests, introduce a separate NPM tools tag, and adjust test stack paths and rollback behavior.

• Bump default Docker and NPM tags to 1.4, parse inline tags/digests, and introduce restateNpmTag
• Update E2E test stack imports/paths, add NO_ROLLBACK support, and adjust stack naming
• Refresh snapshots and update README with new flags

Reviewed Changes

Copilot reviewed 8 out of 11 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
test/e2e/stacks/restate-cloud-lambda-stack.ts	Fix import path to lib/restate-constructs
test/e2e/stacks/ec2-simple-stack.ts	Update import path, dynamic stackName, add SSH rule, asset code
test/e2e/restate-cloud-lambda-test.e2e.ts	Change cdkAppPath to include stacks/ subfolder
test/e2e/ec2-simple-test.e2e.ts	Change cdkAppPath, dynamic stackName
test/e2e/cdk-util.ts	Replace RETAIN_STACK with NO_ROLLBACK flag
test/e2e/README.md	Document new NO_ROLLBACK env var
test/snapshots/restate-constructs...snap	Add CDK metadata to snapshots
lib/restate-constructs/single-node-restate-deployment.ts	Bump default tags, parse image digests, add restateNpmTag

Comments suppressed due to low confidence (1)

lib/restate-constructs/single-node-restate-deployment.ts:65

• The comment states the default tag is latest, but the constant RESTATE_DOCKER_DEFAULT_TAG was updated to 1.4. Please update the doc comment to reflect the new default.

  /** Restate Docker image tag. Defaults to `latest`. */