fix(duct-tape): align pagination/refetch callback with Relay onComplete

[vikasnishal]

Summary

This PR aligns duct-tape’s pagination/refetch callback option naming with Relay.

Relay uses onComplete for loadNext/refetch completion callbacks, while duct-tape only supported onCompleted. That mismatch caused Relay-style options to be ignored at runtime unless users passed both keys manually.

Changes

• Added onComplete?: (error: Error | null) => void to RefetchOptions.
• Kept onCompleted as a backward-compatible alias and marked it deprecated in type docs.
• Updated runtime callback resolution to:
  • Prefer onComplete
  • Fallback to onCompleted
• Applied this behavior in both:
  • Refetch flow
  • Pagination loadNext/loadPrevious flow

Backward Compatibility

• Existing consumers using onCompleted continue to work.
• New/Relay-aligned consumers can use onComplete.
• No breaking API removal in this change.

Tests

• Updated compiledHooks tests to cover:
  • onComplete invocation on success/error
  • deprecated onCompleted alias invocation on success/error
• Manually validated integration in TMP repo by locally symlinking @graphitation/apollo-react-relay-duct-tape from this branch and verifying callback behavior from the consumer side.

Why

This removes a compatibility trap where Relay-style onComplete was not invoked under duct-tape runtime behavior.

[alloy]

LGTM, thanks!

[vikasnishal]

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