Optimize Gatsby GraphQL queries to avoid N+1 issues

[Nesar976]

This PR improves build-time performance by moving filtering logic into the GraphQL queries and removing N+1 query patterns in gatsby-node.js.

The behavior and output remain unchanged; this is purely a performance and maintainability improvement.

Fixes #893

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[Copilot]

Pull request overview

This PR targets Gatsby build-time performance by reducing repeated GraphQL calls in gatsby-node.js and pushing some filtering into GraphQL to avoid N+1 query patterns during page creation (Fixes #893).

Changes:

• Move draft filtering for blog post creation into the GraphQL query via a $draftFilter variable.
• Replace per-category GraphQL queries for blog category pages with a single allPosts query and in-memory filtering.
• Replace per-category/per-page GraphQL queries for labs pages with a single allLabs query and in-memory filtering + slicing for pagination.

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[Nesar976]

Hi @xmulligan , Addressed all review comments and updated the branch.Added GraphQL error handling and pagination safety as suggested . Let me know if anything else is needed.

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 4 comments.

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[Nesar976]

Hi @xmulligan,

Removed the hardcoded limits and added null-safe category filtering.

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 3 comments.

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[Nesar976]

Hi @xmulligan,
Updated panicOnBuild to pass one error instead of the full list . Built category maps once to avoid filtering again and again.

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Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 1 comment.

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