Add preference upload types and helpers to SDK

[michaelfarrell76]

• picked from Add configure-preference-upload CLI command #41
• picked from [cli] multi identifier preference record uploads #11

Summary

• Adds FileFormatState codec — schema-only CSV column mapping type (identifiers, purposes, timestamps, metadata) without upload receipts
• Adds RequestUploadReceipts codec — tracks upload progress, conflicts, failures, and successes
• Adds loadReferenceData helper — fetches purposes, preference topics, and identifiers from the org in parallel
• Adds getPreferenceIdentifiersFromRow — extracts identifiers from a CSV row given a column-to-identifier mapping
• Adds getUniquePreferenceIdentifierNamesFromRow — extracts unique identifiers from a CSV row
• Tests for both identifier helpers

Test plan

• SDK builds cleanly
• All SDK tests pass (16 tests)
• Pre-commit and pre-push hooks pass

Made with Cursor

[pkg-pr-new]

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@transcend-io/cli

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@transcend-io/privacy-types

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@transcend-io/sdk

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@transcend-io/utils

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commit: a5f8735