Bump dependencies

[cmgrote]

Note

Enables branch-aware manual builds with dynamic container image tagging in CI and bumps several dependency versions.

• CI/CD (GitHub Actions):
  • merge.yml:
    • Add workflow_dispatch with branch input and checkout using provided ref.
    • Gate publish-docs and publish-snapshot to main branch pushes.
    • Compute base image tags per event (branch-suffixed for manual, version+latest for main) and use computed tags in build-push.
    • Pass branch to custom-package-container workflow.
  • custom-package-container.yml:
    • Add optional branch input and checkout that ref when provided.
    • Compute image tags per branch/event and use them in build-push.
• Dependencies:
  • Bump elasticsearch to 9.2.1, awssdk to 2.39.1, gcs to 26.72.0, otel to 1.56.0, and otel-instrumentation to 2.22.0-alpha.

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