adds the initial iterative and deep research workflows

feat(search): implement ClinicalTrials.gov filtering (Phase 03)

feat(search): implement PubMed query preprocessing (Phase 02)

refactor(tools): replace BioRxiv with Europe PMC (Phase 01)

fix: wire EmbeddingService to simple orchestrator + improve search quality

feat: Phase 11 bioRxiv Preprint Integration (#19)

refactor: address final CodeRabbit feedback

refactor: address CodeRabbit review feedback for Mario integration

feat: Integrate Mario's Modal code execution + LlamaIndex RAG

refactor: address CodeRabbit nitpicks for Phase 10

feat: Implement Phase 10 (ClinicalTrials.gov) with requests

feat: Complete Phase 9 Source Cleanup (Remove WebTool) (#14)

fix: address CodeRabbit Phase 5 review feedback

fix: pydantic-ai v1 compatibility and Anthropic model update

fix(phase2): address CodeRabbit review feedback + add examples

fix: resolve mypy divergence between make check and pre-commit

feat(phase2): implement search slice (PubMed, Web, Orchestrator) (#4)

feat(phase1): Foundation & Tooling complete

adds scaffolding