fix: Kelly per-verdict caps, more noise words, higher token limit, Pydantic warning

feat: Sprint 9 — Execution & Quality Control

fix: cron performance — stale seeds, Kelly cache, ticker noise, SEC timeouts

feat: SEC EDGAR ground truth + Kelly Criterion position sizing (Epic 3 & 4)

feat: LangGraph best-practices refactor (Sprint 8 Epics 2-3-4)