### 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
----
#### AI description (iteration 1)
#### PR Classification
Bug fix to remove Personally Identifiable Information (PII) from user CRUD error messages.
#### PR Summary
This pull request ensures that PII is not leaked in error messages during user CRUD operations by only logging error hints for specific internal errors.
- `PostgresMongoClient.cs`: Added checks to log only error hints for error code "42710" to prevent PII leakage in `CreateUserAsync`, `UpdateUserAsync`, `DropUserAsync`, and `UsersInfoAsync` methods.
### 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 `$percentile` accumulator.
- Modified `metadata_cache.c` and `metadata_cache.h` to include OID for the new `BsonPercentileAggregateFunction`.
- Updated migration scripts `pg_helio_api--1.22-0--1.23-0.sql` and `pgmongo--1.22-0--1.23-0.sql` to include new SQL files.
### Does this PR have any customer impact?
yes
### Type (Feature, Refactoring, Bugfix, DevOps, Testing, Perf, etc)
Feature
### Does it involve schema level changes? (Table, Column, Index, UDF, etc level changes)
Yes, UDF
### Are you introducing any new config? If yes, do you have tests with and without them being set?
No
### Release Note (Refer [Template](../docs/release_notes/pgmongo_template.md))
### Description
Implement for stage redact
Related work items: #1798586
### Does this PR have any customer impact?
### Type (Feature, Refactoring, Bugfix, DevOps, Testing, Perf, etc)
### Does it involve schema level changes? (Table, Column, Index, UDF, etc level changes)
### Are you introducing any new config? If yes, do you have tests with and without them being set?
### Release Note (Refer [Template](../docs/release_notes/pgmongo_template.md))
### Description
the PR to fix some cases of jstests/core/server6238.js, 
15 line of case cannot be fixed yet, because `$a` is not a operator, in group stage should report `InvalidPipelineOperator`, in project stage, should report error code `31325` . so to fix the case, we need to distinguish the group stage and the project stage in ParseAggregationExpressionData Function.
fix some cases of jstest.
when field is start with "$", ErrorCode should is 16410.
example:
```
db.coll1.aggregate([
{
$project: {
$a: "$a"
}
}
]);
```
when field is invalidOperator, ErrorCode should is 40236
```
db.jstest1.aggregate([
{
$group: {
_id: "$_id",
$a: {
$sum: 1
}
}
}
]);
```
----
#### AI description (iteration 1)
#### PR Classification
Bug fix
#### PR Summary
This pull request addresses a bug in the jstest_server by adding a new error code and updating related error handling logic.
- `helio_conversion_codes.c`: Added handling for `ERRCODE_HELIO_LOCATION40236`.
- `bson_tree.c` and `bson_io.c`: Updated error codes to use `ERRCODE_HELIO_LOCATION40236`.
- `helio_errors.h`, `helio_codes.txt`, `helioerrors.csv`, `mongoerrors.csv`, and `mongo_codes.csv`: Added definitions and entries for `ERRCODE_HELIO_LOCATION40236`.
### 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
This is the PR to fix js error of jstests/core/server1470.js
In upsert case, TraverseQueryDocumentAndProcess skips processing $ref or $id, for example, given sample query:
`db.server1470.update({
"name": "first",
"pic": {"$ref": "foo", "$id": ObjectId("4c48d04cd33a5a92628c9af6")}
}, {$set: {x: 1}}, true, true);`
"pic" field is skipped and not inserted in the collection.
Changes includes:
1. Support $ref and $id in upsert case
2. handle error cases
----
#### AI description (iteration 1)
#### PR Classification
New feature
#### PR Summary
This pull request adds support for DBRef in upsert operations.
- Modified `bson_query.c` to handle `$ref` and `$id` operators during upsert.
- Updated `query_operator.c` to include error handling for DBRef fields.
- Added new test cases in `commands_update.sql` and `commands_update.out` to validate DBRef upsert functionality.
- Introduced new error codes in `helio_errors.h`, `helio_codes.txt`, and related CSV files for DBRef validation errors.
### Does this PR have any customer impact?
No
### Type (Feature, Refactoring, Bugfix, DevOps, Testing, Perf, etc)
Refactor
### Does it involve schema level changes? (Table, Column, Index, UDF, etc level changes)
Not yet
### Are you introducing any new config? If yes, do you have tests with and without them being set?
No
### Release Note (Refer [Template](../docs/release_notes/pgmongo_template.md))
### Description
Initial setup for documentdb extensions.
Create Makefiles and set up build scripts around documentdb.
This does not yet touch the actual code or make anything deployable.
----
#### AI description (iteration 1)
#### PR Classification
Initial setup for DocumentDB integration.
#### PR Summary
This pull request sets up the initial structure and configuration for DocumentDB integration.
- Added `documentdb_errors.h` for defining DocumentDB-specific error codes.
- Created `Makefile` for `pg_documentdb`, `pg_documentdb_core`, and `pg_documentdb_distributed` to handle build configurations.
- Updated `validate_helio_extension_state.sh` and `validate_headers.sh` scripts to include checks for DocumentDB.
- Modified `bson_aggregation_nested_pipeline.c`, `bson_aggregation_vector_search.c`, and other source files to replace references from Helio to DocumentDB.
- Added control files for `pg_documentdb`, `pg_documentdb_core`, and `pg_documentdb_distributed` extensions.
Deepak Pemmaraju
Xing Fan
Shuai Tian
Duan Pei
Xiaochun Liang
Vinod Sridharan
