blip tester: pass full history to proposeChanges

[torcolvin]

There are not yet tests which require this code, that will come shortly.

• Fix jira ticket number about proposeChanges
• Pass full hlv history to proposeChanges
• Accept 409 pushing a rev, which will happen if proposeChanges was OK and then a conflict appears wheen

Pre-review checklist

• Removed debug logging (fmt.Print, log.Print, ...)
• Logging sensitive data? Make sure it's tagged (e.g. base.UD(docID), base.MD(dbName))
• Updated relevant information in the API specifications (such as endpoint descriptions, schemas, ...) in docs/api

Integration Tests

• GSI=true,xattrs=true https://jenkins.sgwdev.com/job/SyncGateway-Integration/3237/

[Copilot]

Pull Request Overview

This PR updates the BLIP tester client to pass full HLV (Hybrid Logical Vector) history to proposeChanges requests and handles 409 conflicts that may occur after successful proposeChanges calls.

Key changes:

• Pass complete HLV history string to proposeChanges when HLV is enabled
• Accept 409 conflict responses during rev push as non-errors
• Fix JIRA ticket reference from CBG-4466 to CBG-4461

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
rest/utilities_testing_blip_client.go	Updates proposeChanges to include full HLV history and handles 409 conflicts in sendRev
db/crud.go	Corrects JIRA ticket reference in comment from CBG-4466 to CBG-4461

[torcolvin]

Superseded by #7657