ci: update workflows on release/25.10-lts

[fluentdo-ci]

Update workflows automatically on release/25.10-lts

• Created by https://github.com/telemetryforge/agent/actions/runs/23306286053
• Auto-generated by create-pull-request: https://github.com/peter-evans/create-pull-request

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Summary by cubic

Update CI on the 25.10 LTS branch to generate container JSON schemas during builds and lock test versions on tagged releases. This improves release artifacts and prevents version mismatches in container tests.

• CI
  • build.yaml: Add non-blocking step to generate JSON schemas from UBI and Distroless images and publish the UBI schema as the main artifact.
  • call-test-containers.yaml: On refs/tags/v*, set TELEMETRY_FORGE_AGENT_VERSION and FLUENTDO_AGENT_VERSION from inputs.image-tag to test the exact release images.

^{Written for commit 2f27821. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 2 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.