v4.0.0-rc5

What's Changed

• chore: update Go version to 1.25.8 by @rach-id in #255
• chore(deps): bump golang.org/x/sync from 0.19.0 to 0.20.0 by @dependabot[bot] in #253
• feat: add IsFibreBlob method to Blob type by @rootulp in #256
• chore: update CODEOWNERS to use protocol team by @rootulp in #257
• chore: add Hacken bug bounty PR guidelines to CLAUDE.md by @rootulp in #258
• chore(deps): bump github.com/celestiaorg/nmt from 0.24.2 to 0.24.3 by @dependabot[bot] in #259
• chore(ci): pin GitHub Actions and scope GITHUB_TOKEN permissions by @rootulp in #260
• chore(deps): bump tspascoal/get-user-teams-membership from 3.0.0 to 4.0.1 by @dependabot[bot] in #261
• chore(deps): bump golangci/golangci-lint-action from 9.2.0 to 9.2.1 by @dependabot[bot] in #263
• chore(deps): bump tspascoal/get-user-teams-membership from 4.0.1 to 4.0.2 by @dependabot[bot] in #262
• chore(deps): bump celestiaorg/.github from 0.6.4 to 0.6.5 by @dependabot[bot] in #264
• chore(deps): bump golang.org/x/sync from 0.20.0 to 0.21.0 by @dependabot[bot] in #265
• test: pin share prefix layout by @rootulp in #268
• chore(deps): bump actions/checkout from 6 to 7 by @dependabot[bot] in #269
• chore(deps): bump golangci/golangci-lint-action from 9.2.1 to 9.3.0 by @dependabot[bot] in #270
• fix!: domain-separate and length-prefix Blob.Hash preimage by @rootulp in #266

Full Changelog: v4.0.0-rc4...v4.0.0-rc5