Fix CausalConv1d sample links and backends architecture fence

[pmdavies-nv]

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Affected area

• Documentation or samples

Summary

• Replace broken relative ../../samples/python/*.ipynb links in docs/operations/CausalConv1d.md with GitHub absolute URLs.
• Mark the architecture diagram code block in docs/python_graph_and_execution_backends.md as text.

Why

• Relative sample notebook links do not resolve when these docs are consumed outside this repository (samples are not present in the docs publishing context).
• The untyped architecture fence can be misinterpreted by syntax highlighters because of Unicode arrows.

Related issues

N/A

API and compatibility impact

None

Testing

• Docs-only change; verified link targets match existing samples/python/ notebooks and followed the same absolute-URL pattern used elsewhere in docs/.

Summary by CodeRabbit

• Documentation
  • Updated notebook references with direct GitHub links for forward and backward examples.
  • Clarified the architecture diagram’s code block language annotation.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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Plan: Enterprise

Run ID: 3678732e-8793-48ae-be5e-fb71c3db338c

📥 Commits

Reviewing files that changed from the base of the PR and between 3f17f5b and 61edddf.

📒 Files selected for processing (2)

• docs/operations/CausalConv1d.md
• docs/python_graph_and_execution_backends.md

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📝 Walkthrough

Walkthrough

The change updates three CausalConv1d notebook link pairs to absolute GitHub URLs and marks an architecture diagram code fence as text.

Changes

Documentation updates

Layer / File(s)	Summary
Documentation references and markup docs/operations/CausalConv1d.md, docs/python_graph_and_execution_backends.md	The NHW, NWH, and B2B notebook links now use absolute GitHub URLs. The architecture diagram fence now uses the text annotation.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Suggested reviewers: anerudhan

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes both documentation changes: fixing CausalConv1d links and annotating the backends architecture fence.
Description check	✅ Passed	The description includes all required sections and clearly explains the documentation changes, rationale, compatibility impact, and testing performed.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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