chore(camel-test-infra-docling): upgrade docling.container to v1.30.0

[davsclaus]

Summary

• Upgrade docling container from v1.29.0 to v1.30.0
• Update OcrExtractionIT.testOcrWithMultipleTextBlocks sentinel assertion: docling v1.30.0 now includes page furniture (headers/footers) in the default body export, so the test now asserts footer text is present (was previously asserting it was absent)
• Update documentation note in docling-component.adoc to reflect the new behavior

Supersedes #25417 which had merge conflicts. Addresses the behavioral change flagged by @gnodet's local IT results.

Test plan

• CI build passes
• Integration tests with docling v1.30.0 pass (the OCR test assertion is updated to match new behavior)

Claude Code on behalf of davsclaus

🤖 Generated with Claude Code

Co-Authored-By: Claude Opus 4.6 (1M context) noreply@anthropic.com

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