feat(ordered-collection): Enable rollback for ConsensusOrderedCollection

[scottn12]

Description

This PR enables rollback for the ConsensusOrderedCollection DDS.

Since it's a consensus-based DDS, we don't actually modify any data until an op is ack'd. The only requirement for rollback is to resolve open promises for local ops that are usually resolved in processCore(). The promises are already setup to "do nothing" when resolved with undefined, so we simply call the resolve function in the localOpMetadata with undefined.

Misc

AB#47480

[github-actions]

🔗 Found some broken links! 💔

Run a link check locally to find them. See
https://github.com/microsoft/FluidFramework/wiki/Checking-for-broken-links-in-the-documentation for more information.

linkcheck output

> fluid-framework-docs-site@0.0.0 ci:check-links /home/runner/work/FluidFramework/FluidFramework/docs
> start-server-and-test "npm run serve -- --no-open" 3000 check-links

1: starting server using command "npm run serve -- --no-open"
and when url "[ 'http://127.0.0.1:3000' ]" is responding with HTTP status code 200
running tests using command "npm run check-links"


> fluid-framework-docs-site@0.0.0 serve
> docusaurus serve --no-open

[SUCCESS] Serving "build" directory at: http://localhost:3000/

> fluid-framework-docs-site@0.0.0 check-links
> linkcheck http://localhost:3000 --skip-file skipped-urls.txt

 ELIFECYCLE  Command failed with exit code 1.

[Copilot]

Pull Request Overview

This PR enables rollback functionality for the ConsensusOrderedCollection DDS by implementing the rollback method. Since this is a consensus-based DDS that doesn't modify data until ops are acknowledged, rollback is implemented by resolving open promises for local operations with undefined, which causes them to gracefully handle the rolled-back state.

Key changes:

• Implemented the rollback method in ConsensusOrderedCollection to resolve pending promises with undefined
• Added comprehensive test coverage for various rollback scenarios
• Extended test utilities with acquireAndRelease and waitAcquireAndRelease helper methods

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/dds/ordered-collection/src/consensusOrderedCollection.ts	Implements the rollback method to resolve pending operation promises with undefined
packages/dds/ordered-collection/src/testUtils.ts	Adds new helper methods for acquire-and-release test patterns
packages/dds/ordered-collection/src/index.ts	Exports the new test utility functions
packages/dds/ordered-collection/src/test/consensusOrderedCollection.spec.ts	Adds comprehensive rollback test suite covering various scenarios
packages/dds/ordered-collection/api-report/ordered-collection.legacy.beta.api.md	Updates API surface to reflect the new protected rollback method