Move the canonical API into crewai.flow while preserving experimental imports and declarative references through compatibility aliases. Co-authored-by: Cursor <cursoragent@cursor.com>
* Define stream frame protocol for flows * Add direct LLM streaming helpers * Unify flow streaming frame items * Update flow streaming integration properties * Drop stream frame debug runner example * Address streaming contract review feedback * Replay cached stream frame projections * Remove stream frame version field * Fix streaming contract docs link * Preserve LLM instance state for stream events * Address streaming review cleanup
