chore: update n8n to 2.29.x (#923)

* chore: update n8n to 2.29.x and bump version to 2.63.2

- Updated n8n dependency set for n8n 2.29.8: n8n-nodes-base 2.28.4 -> 2.29.7, n8n-core 2.28.5 -> 2.29.7, n8n-workflow 2.28.4 -> 2.29.3, @n8n/n8n-nodes-langchain 2.28.6 -> 2.29.7

- Rebuilt node database with 2,150 nodes: 826 core and 1,324 community

- Refreshed community nodes: 1,177 verified and 147 unverified; README coverage 1,313/1,324 and AI summaries 1,295/1,324

- Updated package/runtime versions, README badge/counts, and CHANGELOG

Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en

* chore: backfill 18 community AI summaries via Azure (1,295 -> 1,313)

Generated AI documentation summaries for the 18 community nodes that had
an npm README but no summary, using the shared Azure OpenAI deployment
(gpt54mini) since the local LLM endpoint was unavailable during the
2.29.x update. Community AI-summary coverage rises 1,295 -> 1,313/1,324;
the remaining 11 nodes have no npm README to summarize. Updated the
2.63.2 CHANGELOG entry to reflect the new count.

Concieved by Romuald Członkowski - www.aiadvisors.pl/en

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

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Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: 3 people