Discover threads via semantic search

Finds threads/conversations matching a semantic query.

Uses AI-powered semantic search to find relevant threads across all integrations. Results are ranked by relevance score.

Filtering options:

• integration_ids: Limit search to specific integrations
• integration_types: Limit by integration type (e.g., "slack", "gmail")
• after_date / before_date: Filter by time range

Example:

{
  "query": "discussions about PR #197 authentication fix",
  "integration_types": ["slack"],
  "limit": 5
}