Package multiple FHIR R4 resources produced from OpenMed output into a single valid transaction Bundle ready to POST to an EHR, using OpenMed's verified bundle assembler openmed.clinical.exporters.fhir.to_bundle. Covers deterministic urn:uuid fullUrls, automatic in-Bundle reference rewriting, request blocks (method/url) for transaction vs batch, and conditional create. Use after exporting-to-fhir when the user has several Condition/Observation/MedicationStatement resources and wants one transaction Bundle, mentions Bundle, transaction, references, or posting to a FHIR server. Builds on exporting-to-fhir; pairs after.