refactor: enhance block name resolution and schema mapping for WordPr…

[AishDani]

…ess integration

[Copilot]

Pull request overview

This PR refactors WordPress block name resolution to better handle core/missing blocks (using originalName) and extends schema/value mapping to support additional block types (notably Jetpack Markdown) during WordPress migration ingestion.

Changes:

• Updated block-name resolution to prefer metadata.name, then originalName for core/missing, and normalize media blocks to media.
• Added dedicated schema mapping for core/missing (including a markdown field type for jetpack/markdown) and adjusted schema assembly for certain blocks (e.g., core/search).
• Updated WordPress service-side schema matching to consider both otherCmsField and otherCmsType, and added formatting support for markdown.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 5 comments.

File	Description
upload-api/migration-wordpress/libs/schemaMapper.ts	Refines block-name resolution and introduces/adjusts schema mapping for core/missing and core/search.
upload-api/migration-wordpress/libs/extractItems.ts	Improves core/missing resolution and structure comparison by incorporating originalName.
api/src/services/wordpress.service.ts	Adds shared block-name resolver, broadens matching rules, removes reliance on metadata.name alone, and adds markdown formatting support.

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