feat(comment): render non-media attachments as a file table

[Zach Dunn (zachdunn)]

Non-media attachments (PDF, zip, text, CSV, JSON, markdown, tgz) in the managed GitHub attachments comment now render as a small markdown table instead of bare list links. Image grid and video rendering are unchanged.

Example render (from test/fixtures/github-comment-files.json):

File	Type	Size
archive.zip · page	ZIP	5.2 MB
data.csv	CSV	850 B
report.pdf · page · /reports · after	PDF	2.4 MB

What changed

• AttachmentItem gains optional size/contentType, populated by gatherAttachments (apps/api), the settings comment-preview handler, and the CLI's gh-fallback attachment listing.
• The renderer classifies an item as a file (table row) when it's neither image nor video by content type (preferring contentType, falling back to the filename extension — application/octet-stream, the server's generic default for an object with no explicit type, defers to the filename too, so untyped screenshots keep rendering as images).
• File items never count toward maxInlineImages and never land in the overflow <details> block — always in the table.
• Two existing golden fixtures (github-comment-golden.json, github-comment-golden-meta.json) already contained a .log attachment and their expected output changed from a bullet to the new table; updated by hand.
• previewFixtureItems (settings comment preview) gained report.pdf/bundle.zip fixtures so the preview shows the table too.
• Regenerated the CLI's inlined copy (packages/uploads/src/comment-render.generated.ts) via node packages/uploads/scripts/inline-shared.mjs.

Test command

pnpm test

5962 tests passed (in-process fakes, no services needed). Also ran pnpm typecheck and pnpm format:check clean.

Refs #946

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🦋 Changeset detected

Latest commit: 4f33894

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@buildinternet/uploads	Patch

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