This extracts some common API-idiosyncracy-handling patterns from model serialisers into properties that are processed by the application serialiser:
* arrayNullOverrides converts a null property value to an empty array
* mapToArray converts a map to an array of maps, using the original map keys as Name properties on the array maps
* separateNanos splits nanosecond-containing timestamps into millisecond timestamps and separate nanosecond properties
Manual interventions:
• decorators on the same line for service and controller
injections and most computed property macros
• preserving import order when possible, both per-line
and intra-line
• moving new imports to the bottom
• removal of classic decorator for trivial cases
• conversion of init to constructor when appropriate
