fix: filter aliased folder types in SDRMetadataAdapter

[scolladon]

Explain your changes

EmailTemplateFolder (id: emailtemplatefolder, aliasFor: "emailfolder") shares directoryName: "email" with EmailTemplate. It passed the folder-type filter in getOrCreateCache() because no type references emailtemplatefolder as a folderType. It overwrote EmailTemplate in the metadataPerDir map, causing email files to silently resolve to the wrong type and be dropped.

Extend getOrCreateCache() to also exclude types whose aliasFor points to a known folder type. The fix is generic — not hardcoded to emailtemplatefolder — so future SDR types with aliasFor pointing to folder types will be handled automatically.

Does this close any currently open issues?

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• Jest tests added to cover the fix.
• NUT tests added to cover the fix.
• E2E tests added to cover the fix.

Any particular element that can be tested locally

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# Verify EmailTemplate resolves correctly
npx jest __tests__/unit/lib/metadata/sdrMetadataAdapter.test.ts -t "EmailTemplate"

# Run full test suite
npm test

Any other comments

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Currently emailtemplatefolder is the only SDR type with aliasFor, but the fix handles any future alias types generically.

[github-actions]

Published under dev-1222 npm channel.

$ sf plugins install sf-git-merge-driver@dev-1222

[github-actions]

Shipped in release v6.32.3.
Version v6.32.3 will be assigned to the latest npm channel soon
Install it using either v6.32.3 or the latest-rc npm channel

$ sf plugins install sfdx-git-delta@latest-rc
# Or
$ sf plugins install sfdx-git-delta@v6.32.3

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