feat: Implement Free Tier synthesis using HuggingFace Inference

fix(SPEC_11): address CodeRabbit review feedback (#92)

feat(SPEC_11): finalize transition to Sexual Health Research Specialist

fix: align pre-commit hook versions with CI

feat: Enhance research workflow with embedding service integration

feat: Integrate LangGraph for enhanced research orchestration

fix(P0): Implement SPEC_06 - Simple Mode Synthesis Fix (#71)

refactor: Organize orchestrators into dedicated package

fix: skip Modal integration tests when package not installed

feat: implement dual-mode architecture (Simple + Advanced) (#45)

refactor: address CodeRabbit nitpick suggestions

feat: implement phase 13 modal pipeline integration

docs: address CodeRabbit feedback for Phase 12 PR

feat: enhance Gradio UI with MCP server support and new tool interfaces

feat(phase1): Foundation & Tooling complete