docs(data-migrator): document automatic dependency resolution

[tasso94]

Description

related to camunda/camunda-7-to-8-migration-tooling#1027

When should this change go live?

• This is a bug fix, security concern, or something that needs urgent release support. (add bug or support label)
• This is already available but undocumented and should be released within a week. (add available & undocumented label)
• This is on a specific schedule and the assignee will coordinate a release with the Documentation team. (create draft PR and/or add hold label)
• This is part of a scheduled alpha or minor. (add alpha or minor label)
• There is no urgency with this change (add low prio label)

PR Checklist

• The commit history of this PR is cleaned up, using {type}(scope): {description} commit message(s)

• My changes are for an upcoming minor release and are in the /docs directory (version 8.9).
• My changes are for an already released minor and are in a /versioned_docs directory.

• I added a DRI, team, or delegate as a reviewer for technical accuracy and grammar/style:
  • Engineering team review
  • Technical writer review via @camunda/tech-writers unless working with an embedded writer.

[github-actions]

👋 🤖 🤔 Hello, @christinaausley! Did you make your changes in all the right places?

These files were changed only in docs/. You might want to duplicate these changes in versioned_docs/version-8.8/.

• docs/guides/migrating-from-camunda-7/migration-tooling/data-migrator/history.md
• docs/guides/migrating-from-camunda-7/migration-tooling/data-migrator/limitations.md

You may have done this intentionally, but we wanted to point it out in case you didn't. You can read more about the versioning within our docs in our documentation guidelines.

[Copilot]

Pull request overview

This PR documents the automatic dependency resolution feature in the Data Migrator tool for migrating from Camunda 7 to Camunda 8. The changes explain how the migrator now automatically retries skipped entities to resolve cross-entity-type dependencies, reducing the need for manual intervention with the --retry-skipped flag.

Changes:

• Documents automatic retry mechanism for handling entity dependencies during migration
• Adds information about unsupported entity types (CMMN entities and standalone user tasks)
• Improves formatting consistency with indentation fixes

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
docs/guides/migrating-from-camunda-7/migration-tooling/data-migrator/limitations.md	Expands the limitations section to document automatic retry behavior for dependency-based skips, adds unsupported entity types, and fixes indentation in the incidents section
docs/guides/migrating-from-camunda-7/migration-tooling/data-migrator/history.md	Updates the error handling section with detailed information about automatic retry mechanism and provides examples of cross-entity-type dependencies

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[christinaausley]

Nice 🚀 Happy to re-approve or help with merge conflict.

[tasso94]

@christinaausley, I realized there was one more detail that I just fixed. Can you review my last change?