build(deps): bump github.com/elastic/elastic-transport-go/v8 from 8.8.0 to 8.9.0

[dependabot]

Bumps github.com/elastic/elastic-transport-go/v8 from 8.8.0 to 8.9.0.

Release notes

Sourced from github.com/elastic/elastic-transport-go/v8's releases.

v8.9.0

8.9.0 (2026-02-24)

Features

• Add functional options pattern for transport client creation (#74) (dbc2c13)
• Upgrade Go from 1.20 to 1.21 (209a7aa)

Bug Fixes

• Add defensive check in discovery to prevent panic when no URLs are configured (dbc2c13)
• Don't put gzipWriters with errors back into the pool (#62) (6b78c54)
• Ensure global HTTP request headers are set correctly in transport client (#64) (bfc0323)
• Improve client pool concurrency safety and performance (#67) (6507084)
• Linting rules satisfied (793a813)
• Prevent drainErrChan from missing errors due to non-blocking receive (#65) (0f0e5ac)
• Remove deprecated code (#53) (793a813)
• Replace slice manipulation with slices.Delete (209a7aa)
• Return pooled gzip buffers on compression errors (#70) (dfdb552)
• Use net.SplitHostPort in getNodeURL for IPv6 support (#63) (e2d86cf)

Performance Improvements

• Reduce metrics hot-path lock contention (#72) (9d402f8)
• Replace roundRobinSelector initialization with newRoundRobinSelector function for improved atomicity #71 (15632e3)

Changelog

Sourced from github.com/elastic/elastic-transport-go/v8's changelog.

8.9.0 (2026-02-24)

Features

• Add functional options pattern for transport client creation (#74) (dbc2c13)
• Upgrade Go from 1.20 to 1.21 (209a7aa)

Bug Fixes

• Add defensive check in discovery to prevent panic when no URLs are configured (dbc2c13)
• Don't put gzipWriters with errors back into the pool (#62) (6b78c54)
• Ensure global HTTP request headers are set correctly in transport client (#64) (bfc0323)
• Improve client pool concurrency safety and performance (#67) (6507084)
• Linting rules satisfied (793a813)
• Prevent drainErrChan from missing errors due to non-blocking receive (#65) (0f0e5ac)
• Remove deprecated code (#53) (793a813)
• Replace slice manipulation with slices.Delete (209a7aa)
• Return pooled gzip buffers on compression errors (#70) (dfdb552)
• Use net.SplitHostPort in getNodeURL for IPv6 support (#63) (e2d86cf)

Performance Improvements

• Reduce metrics hot-path lock contention (#72) (9d402f8)
• Replace roundRobinSelector initialization with newRoundRobinSelector function for improved atomicity #71 (15632e3)

Commits

• 39096f9 chore(main): release 8.9.0 (#55)
• dbc2c13 feat: add functional options pattern for transport client creation (#74)
• 15632e3 refactor: replace roundRobinSelector initialization with newRoundRobinSelecto...
• 9d402f8 perf: reduce metrics hot-path lock contention (#72)
• dfdb552 fix: return pooled gzip buffers on compression errors (#70)
• 6507084 fix: improve client pool concurrency safety and performance (#67)
• ba519ab ci: add benchmark performance checks workflow (#69)
• 0f0e5ac fix: prevent drainErrChan from missing errors due to non-blocking receive (#65)
• bfc0323 fix: ensure global HTTP request headers are set correctly in transport client...
• e2d86cf fix: use net.SplitHostPort in getNodeURL for IPv6 support (#63)
• Additional commits viewable in compare view

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