Add Entity Query node processor for querying Drupal entities

Summary

Add an Entity Query node processor that enables querying Drupal entities within workflows. This provides powerful data retrieval capabilities with configurable filtering, sorting, and pagination.

Business Value

• Enables data-driven workflows that operate on existing content
• Supports batch processing by querying entities for iteration
• Provides flexible filtering to target specific content subsets
• Enables content audit and validation workflows

Query Parameters

• entity_type: Entity type to query (node, taxonomy_term, user, etc.)
• bundle: Filter by content type/bundle
• published_only: Filter to published entities only
• changed_after: Filter by modification timestamp
• conditions: Array of custom field conditions with operators
• sort_field: Field to sort results by
• sort_direction: ASC or DESC
• limit: Maximum results (1-1000)
• offset: Skip N results for pagination
• load_entities: Load and serialize full entity data

Outputs

• success: Query success indicator
• count: Number of results returned
• results: Array of entity data (id, uuid, label, bundle)
• ids: Array of entity IDs for lightweight processing
• entities: Full serialized entities (when load_entities=true)
• has_more: Indicates more results exist beyond limit