Fetch detailed information about a data asset by its identifier.
Resolves the asset, then fetches the requested sections in parallel. Use this after
advanced_search or resolve_asset_id to get deeper information about a specific asset.
Sections:
- overview: asset description, importance, owner, metadata
- columns: full column schema with types and descriptions
- tests: dbt test coverage (only for assets with a dbt parent)
- context_counts: cheap count of linked tickets and Slack threads
- tickets: full Jira/Linear ticket content
- slack: full Slack thread content (truncated to first 5 messages per thread)