impr: ARSN-563 change error code of RaftSessionLeaderNotConnected to 500

[jonathan-gramain]

The RaftSessionLeaderNotConnected Arsenal error was mapped to HTTP 400 (client error), but "not connected to the leader" is a server-side condition that the client cannot influence. Change it to 500 (server error) so callers can correctly distinguish it from bad-request errors.

Also update the description to the more human-readable 'not connected to the RAFT session leader'.

[bert-e]

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[bert-e]

Incorrect fix version

The Fix Version/s in issue ARSN-563 contains:

• 8.2.49

Considering where you are trying to merge, I ignored possible hotfix versions and I expected to find:

• 8.2.49

• 8.3.9

Please check the Fix Version/s of ARSN-563, or the target
branch of this pull request.

[jonathan-gramain]

ping

[claude]

LGTM — the 400→500 change is correct: "not connected to the leader" is a server-side condition, not a client error.

Minor note: the new description style ('not connected to the RAFT session leader') is lowercase/sentence-style, while most other errors in the file use PascalCase identifiers (e.g. 'NotLeader', 'NoLeaderForDB'). This is called out as intentional in the PR description, just flagging for awareness.

Review by Claude Code

[bert-e]

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[jonathan-gramain]

/approve

[bert-e]

Conflict

A conflict has been raised during the creation of
integration branch w/8.3/improvement/ARSN-563-change-RaftSessionLeaderNotConnected-code-to-500 with contents from improvement/ARSN-563-change-RaftSessionLeaderNotConnected-code-to-500
and development/8.3.

I have not created the integration branch.

Here are the steps to resolve this conflict:

 git fetch
 git checkout -B w/8.3/improvement/ARSN-563-change-RaftSessionLeaderNotConnected-code-to-500 origin/development/8.3
 git merge origin/improvement/ARSN-563-change-RaftSessionLeaderNotConnected-code-to-500
 # <intense conflict resolution>
 git commit
 git push -u origin w/8.3/improvement/ARSN-563-change-RaftSessionLeaderNotConnected-code-to-500

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[bert-e]

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

• ✔️ development/8.2

• ✔️ development/8.3

The following branches have NOT changed:

• development/6.4
• development/7.10
• development/7.4
• development/7.70
• development/8.1

Please check the status of the associated issue ARSN-563.

Goodbye jonathan-gramain.

The following options are set: approve