v4.0.0-rc6

What's Changed

• chore(deps): bump golang.org/x/sync from 0.21.0 to 0.22.0 by @dependabot[bot] in #271
• chore(deps): bump actions/setup-go from 6 to 7 by @dependabot[bot] in #273
• chore(deps): bump actions/setup-node from 6 to 7 by @dependabot[bot] in #272
• chore(deps): bump github.com/stretchr/testify from 1.11.1 to 1.12.0 by @dependabot[bot] in #280
• chore(deps): bump google.golang.org/protobuf from 1.36.11 to 1.36.12 by @dependabot[bot] in #279
• fix: validate tx ordering in TxShareRange and BlobShareRange by @rootulp in #283
• fix: return error from AppendFibreTx on nil fibre tx or system blob by @rootulp in #282
• feat!: require callers to classify transactions by @rootulp in #277
• chore: preallocate slices flagged by prealloc by @rootulp in #281

Full Changelog: v4.0.0-rc5...v4.0.0-rc6