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Xing Fan
722ef60784
### Does this PR have any customer impact? ### Type (Feature, Refactoring, Bugfix, DevOps, Testing, Perf, etc) ### Does it involve schema level changes? (Table, Column, Index, UDF, etc level changes) ### Are you introducing any new config? If yes, do you have tests with and without them being set? ### Release Note (Refer [Template](../docs/release_notes/pgmongo_template.md)) ### Description draft ---- #### AI description (iteration 1) #### PR Classification New feature #### PR Summary This pull request introduces new aggregation functions and support for t-digest in the project. - Added `bson_tdigest.c` to implement t-digest helper functions. - Created new SQL aggregate functions in `group_aggregates--1.23-0.sql` and `group_aggregates_support--1.23-0.sql`. - Updated `bson_aggregation_pipeline.c` to handle the new `$percentile` accumulator. - Modified `metadata_cache.c` and `metadata_cache.h` to include OID for the new `BsonPercentileAggregateFunction`. - Updated migration scripts `pg_helio_api--1.22-0--1.23-0.sql` and `pgmongo--1.22-0--1.23-0.sql` to include new SQL files.