Loading Fix For Named Version Selector

[CalebGerman]

🚀 Named Version Optimization & Bug Fixes

Performance Issues Fixed:

1. Eliminated massive changeset over-fetching

   • Previously loaded ALL changesets [0 -> Inf) upfront
   • Now uses efficient pagination (20 items at a time)

2. Parallelized individual changeset queries

   • Replaced sequential api calls with more efficient method of querying resulting in less load time

Critical Bug Fixed:

3. Missing index offset for Named Versions
   • Fixed to properly apply +1 offset as required by Changed Elements API

Result:

• Correct comparison ranges (was comparing wrong changeset ranges before)
• Prevents massive amounts of queries due to preloading changesets

The optimization maintains identical functionality while fixing the core performance bottleneck and ensuring API compliance.

[changeset-bot]

🦋 Changeset detected

Latest commit: c7e52fd

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@itwin/changed-elements-react	Patch

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