docs: additional documentation improvements and cleanup phase 2 Builds on v0.3.0 with additional documentation enhancements from subagent work. Completed: - DOC-010: Added Qdrant configuration variables to example env file - DOC-012: Created CONTRIBUTING.md for developer onboarding - DOC-013: Created API versioning strategy document - DOC-009: Verified TODO.md already complete In Progress: - DOC-004: CI pipeline patterns documentation - DOC-005: Security model consolidation - DOC-008: Architecture diagrams re-rendering - DOC-011: Deployment decision guide - DOC-014: Observability documentation This release continues the comprehensive documentation cleanup effort to transform MD.Hyde from 'planning workspace' to production-ready clinical software with professional documentation standards. Files changed: 3 files (+935/-2) Parent release: md-hyde/v0.3.0 (d897e5f)