ci: update version

[fluentdo-ci]

Update version

• Created by https://github.com/telemetryforge/agent/actions/runs/27951064844
• Auto-generated by create-pull-request: https://github.com/peter-evans/create-pull-request

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Summary by cubic

Bumps Telemetry Forge Agent to v26.7.1. Updates Dockerfiles (Debian/UBI), CMake version, and test/setup scripts so builds and tests use the new release and produce v26.7.1 images.

^{Written for commit 753a0ad. Summary will update on new commits.}

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

[cubic-dev-ai]

No issues found across 6 files

Confidence score: 5/5

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

_{Re-trigger cubic}

[coveralls]

Coverage Report for CI Build 27951088767

Coverage remained the same at 57.863%

Details

• Coverage remained the same as the base build.
• Patch coverage: No coverable lines changed in this PR.
• 2 coverage regressions across 1 file.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

2 previously-covered lines in 1 file lost coverage.

File	Lines Losing Coverage	Coverage
src/flb_storage.c	2	73.58%

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Coverage Stats

Relevant Lines:	161336
Covered Lines:	94466
Line Coverage:	58.55%
Relevant Branches:	35593
Covered Branches:	19483
Branch Coverage:	54.74%
Branches in Coverage %:	Yes
Coverage Strength:	5743.87 hits per line

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💛 - Coveralls