Implement all remaining NotImplementedError stubs in ConnectWiseProvider:
- search_tickets: query by summary with board_id, status_id, include_closed filters
- get_ticket_statuses: fetch statuses for a service board
- list_companies: list companies with optional status filter
- get_company: fetch a single company by ID
- get_ticket_configurations: fetch configs attached to a ticket
- Extract shared _map_ticket helper to reduce duplication
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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