match_episode_guests_to_contacts

Sweep episodes that have a guest name but no linked guest contact, and match each guest name against the workspace's contacts using trigram name similarity. Returns each episode pre-classified as matched (one confident candidate, ready to link), ambiguous (multiple/uncertain candidates, needs a human pick), or no_match (create a new contact). Runs the whole sweep server-side in one call per batch — page through large sets with limit/offset using total_candidate_episodes. Apply the proposed links with link_contact_to_episode (single) or link_episode_contacts (batch) after confirming with the user.