Snow Owl v9.1.2

Bugs/Improvements

• [index] fixed an issue where incorrect search results were returned due to incorrect search_analyzer configuration (#1268)
• [index] disable optional regular expression flags when performiny any kind of regexp query (#1266)
• [fhir] fixed an issue where using both the system and version parameters could result in a resource not found error (#1266)
• [fhir] fixed an issue where ValueSet#expand operation responded with a randomized compose definition on each request (#1266)
• [fhir] move resource-level operations to their right place in CapabilitiesStatement (#1266)