add AuditTrail profile #185

[ziegm]

@oliveregger could you please review the changes:

• Profile: https://build.fhir.org/ig/ehealthsuisse/ch-epr-fhir/branches/tracecontext_mz/StructureDefinition-ch-epr-fhir-auditevent.html

• Example: https://build.fhir.org/ig/ehealthsuisse/ch-epr-fhir/branches/tracecontext_mz/AuditEvent-ex-auditProvideBundle-source.json.html

  • I had to adapt the patient slice in the example

• Trace context page: https://build.fhir.org/ig/ehealthsuisse/ch-epr-fhir/branches/tracecontext_mz/tracecontext.html

• Changelog: https://build.fhir.org/ig/ehealthsuisse/ch-epr-fhir/branches/tracecontext_mz/changelog.html