Add come line and odds betting support

[tphummel]

Summary

• add a strategy helper to place come line bets and back them with max odds
• settle come line results, including odds, alongside existing bets
• cover new come bet behavior and odds handling with unit tests

Testing

• npx standard
• NODE_ENV=test ./node_modules/.bin/tap *.test.js --no-check-coverage --coverage-report=text-summary

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Codex Task