Fix ingestion from raft session >=10

[francoisferrand]

The JSON was causing the raftId string (which is the http body of the response) to be returned to
the code as an array of string : [ '1', '3' ]. Which was worked-around by taking the first element.
That fix worked for raft sesion < 10, but breaks when raft session cluster grows.

The fix is to properly define the model, with the payload attribute allowing to indicate that the
body of the request should map to a specified field of the model.

Impact is limited since we only make a call to this API in a single place.

Issue: BB-759

[bert-e]

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[claude]

LGTM

Review by Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.06%. Comparing base (3cc85bb) to head (8958224).
⚠️ Report is 2 commits behind head on development/9.1.

Additional details and impacted files

Files with missing lines	Coverage Δ
lib/queuePopulator/IngestionProducer.js	69.94% <100.00%> (ø)

... and 3 files with indirect coverage changes

Components	Coverage Δ
Bucket Notification	80.37% <ø> (ø)
Core Library	81.34% <100.00%> (+0.59%)	⬆️
Ingestion	70.84% <100.00%> (ø)
Lifecycle	79.09% <ø> (ø)
Oplog Populator	85.06% <ø> (ø)
Replication	61.13% <ø> (+0.03%)	⬆️
Bucket Scanner	85.76% <ø> (ø)

@@                 Coverage Diff                 @@
##           development/9.1    #2727      +/-   ##
===================================================
+ Coverage            74.81%   75.06%   +0.25%     
===================================================
  Files                  201      201              
  Lines                13529    13529              
===================================================
+ Hits                 10122    10156      +34     
+ Misses                3397     3363      -34     
  Partials                10       10              

Flag	Coverage Δ
api:retry	9.28% <0.00%> (ø)
api:routes	9.09% <0.00%> (ø)
bucket-scanner	85.76% <ø> (ø)
ft_test:queuepopulator	10.97% <0.00%> (+1.86%)	⬆️
ingestion	12.66% <100.00%> (ø)
lib	7.85% <0.00%> (ø)
lifecycle	18.99% <0.00%> (+<0.01%)	⬆️
notification	1.03% <0.00%> (ø)
replication	18.89% <0.00%> (ø)
unit	51.02% <0.00%> (ø)

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[SylvainSenechal]

probably gonna have some nice conflict on waterfall

[francoisferrand]

/approve

[claude]

LGTM

Clean fix: the API model now correctly uses a structure with payload to map the HTTP body to RaftId, replacing the bare string type that caused the SDK to parse the response as an array of characters. The consumer code and tests are updated consistently. Good addition of a multi-digit raft session test case to prevent regression.

Review by Claude Code

[bert-e]

I have successfully merged the changeset of this pull request
into targetted development branches:

• ✔️ development/9.1

• ✔️ development/9.2

• ✔️ development/9.3

The following branches have NOT changed:

• development/7.10
• development/7.4
• development/7.70
• development/8.6
• development/9.0

Please check the status of the associated issue BB-759.

Goodbye francoisferrand.

The following options are set: approve