Lista sesiones de onboarding con métricas de conversión + micro-funnel por sesión (setup_opened, install_started, install_completed).

Adds to the previous shape: rows[].ai_client / ai_client_version / os / country / city / isp user_agent (from the first cloud_connector_session event) rows[].pre_token_claimed / pre_token_installed (bool flags — pre_token micro-funnel per session) rows[].setup_page_opened (bool flag from events) rows[].install_started_at / installed_at / install_version / install_os (from pre_tokens row attributed to this session) funnel — now includes the full drop-off chain: total, discovered, setup_opened, install_started, install_completed, resolved, conversion_pct

New filters: ai_client — exact match on cloud_connector_session.ai_client os — exact match on detected OS (macos/windows/linux/ios/android) country — exact match on geo country code (e.g. "US", "AR") min_calls — rows with call_count >= this value exclude_tests (default true) — strip known test/probe clients hours — if set (>0), only sessions active in the last N hours (onboarding_sessions.updated_at; captures ongoing retries/activity)