feat(search): sort results via sortProperties / order_by - #3298
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…der_by) (cherry picked from commit 1b748fb)
Validated against the sortable-field whitelist (name, size, lastModifiedDateTime, photo.takenDateTime) and forwarded to the search service as order_by. Also fixes the stub search service's IndexSpace signature (streaming response) so the suite builds again. (cherry picked from commit 9aa6a34) (cherry picked from commit 35a6cad8ea6a7890bdc0bc98c7ac97bdcbf477cc)
Sortable is every field that is indexed as a scalar and carried on the match entity: name, size, lastModifiedDateTime, mimeType and the scalar facet fields (photo.*, audio.*, image.*, location.*, ...). Both sets are derived by reflection, so new facet fields become sortable automatically. Multivalued fields (tags), bare facets and internal index fields are rejected with invalidRequest at the graph layer. CompareMatches provides the merge comparator for the service layer. (cherry picked from commit bd32795)
The fan-out passes order_by through to each engine query; the merge re-sorts the combined matches with CompareMatches and keeps the score as tiebreaker (and as the sole criterion when no order_by is given). (cherry picked from commit 66af40f)
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(cherry picked from commit 66a0755)
Name is analyzed (lowercaseKeyword) and therefore a text field, which OpenSearch refuses to sort on without fielddata; enable it in the index template. The keyword tokenizer emits one term per document, so the fielddata cache stays small. The schema version has not shipped yet, so no reindex is needed. (cherry picked from commit f1d0e7b)
The grpc layer rebuilt the searcher request field by field and dropped order_by; the response cache also ignored it, so differently sorted searches collided on the same cache entry. (cherry picked from commit 97626bb)
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Adds MS-Graph-style
sortPropertiesto the graph search endpoint andorder_byto the search proto.invalidRequest.name).order_byis wired through the grpc service and its response cache key.Spec: opencloud-eu/libre-graph-api#61
Stacked on #3211.