docs: prepare for open source release

fix: validate phase2 hits with LLM before alerting

feat(shortlist): apply max_days hard filter in get_shortlist()

feat(scanner): add max_days filter to exclude long-horizon markets

fix: process Phase2 decisions before Phase3 LLM calls

fix: add --max-llm-calls CLI arg to prevent cron SIGTERM

fix: repair phase3 claude cli invocation on mi9t

chore: remove betfair module, refocus on polymarket

feat: betfair exchange integration - complete (phases 1-6 + runner)

docs: update implementation plan - all phases complete

feat: betfair runner orchestration (scan/settle/calibrate)

feat: betfair phase 6 - settler, calibration, go/no-go

fix: apply Codex code review findings (2026-03-01)

feat: betfair phases 4+5 - LLM prompts + executor (paper mode)

feat: betfair phase 4 - LLM sports research prompts