feat: Implement filter schema by definition in the editor

[handreyrc]

Closes: #357

Summary

Add schema filter capabilities to cherry-pick a definition and merge any external dependencies into a fully formed scoped schema.

Changes

• Added filterSchema function to filter definitions and sub-definitions
  • Added Filter Schema story
  • Merge external definitions props after target definition props.
  • Added unit tests

Testing

The output of the function getSchemaForDefinition can be tested and validated from the story "Schema Filter".

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[Copilot]

Pull request overview

This PR updates the editor to SDK Alpha-8 and adds a schema-filtering utility that can extract a single $defs definition as a self-contained schema (flattening allOf and bundling transitive $ref dependencies). It also adds Storybook + tests to validate and explore the filtered schema output.

Changes:

• Bumped @openworkflowspec/sdk to ^1.0.3-alpha8 and updated workflow serialization to use the SDK serializer with validate: false.
• Added getSchemaForDefinition / getReferencedDefinitions schema filtering utilities with caching, transitive $defs bundling, and a Storybook “Schema Filter” story.
• Added/updated Vitest tests covering schema filtering and updated graph-building expectations for empty workflows.

Reviewed changes

Copilot reviewed 10 out of 11 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
pnpm-workspace.yaml	Updates catalog versions (SDK alpha-8, changesets/storybook bumps) and adds allof-merge.
pnpm-lock.yaml	Lockfile updates reflecting the dependency bumps/additions.
packages/open-workflow-diagram-editor/tests/core/workflowSdk.integration.test.ts	Updates integration test expectations for SDK behavior on empty-task workflows.
packages/open-workflow-diagram-editor/tests/core/filterSchema.test.ts	Adds unit tests for schema filtering, flattening, and $defs bundling behavior.
packages/open-workflow-diagram-editor/stories/features/SchemaFilter.stories.tsx	Adds a Storybook UI to interactively resolve and inspect filtered schemas.
packages/open-workflow-diagram-editor/src/core/workflowSdk.ts	Switches serialization to SDK serializer with validation disabled.
packages/open-workflow-diagram-editor/src/core/schemaFilter.ts	Implements schema merge/filter utilities, caching, and $defs bundling logic.
packages/open-workflow-diagram-editor/package.json	Adds allof-merge dependency required by schema filtering.
.github/workflows/publish-release.yaml	Updates pinned changesets/action to v2.1.0.
.github/workflows/prepare-release.yaml	Updates pinned changesets/action to v2.1.0.
.github/workflows/ci_codeql.yml	Updates pinned CodeQL action to v4.37.7.

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[fantonangeli]

Thanks @handreyrc 2 small comments

[fantonangeli]

LGTM

[handreyrc]

@lornakelly,

PR rebased from feature branch.
It is ready for your review.

Thanks!

[lornakelly]

LGTM