Added operations to Cloud Diagrams API

Added the following operations and schemas to Cloud Diagrams API:

• POST https://api.doit.com/clouddiagrams/v1/scheme/search: Full-text search across statussheets (cloud accounts), components by name, and components by property values.
• POST https://api.doit.com/clouddiagrams/v1/statussheet/{id}/get: Returns the components of the specified statussheet, optionally filtered to specific component IDs.
• GET https://api.doit.com/clouddiagrams/v1/statussheet/{id}/export-json : Exports the full content of a statussheet (diagram layer) as a structured JSON document, including all components and export metadata.