Change the return value type of Prover::SetupHeadersForUpdate to support stream processing of huge headers

[siburu]

No description provided.

[Copilot]

Pull Request Overview

This PR changes the return type of SetupHeadersForUpdate from a slice of headers to a channel-based stream to enable efficient processing of large header sets. Key changes include refactoring of the method signatures in both mock and Tendermint prover implementations, updating the interface in core/provers.go, and adding helper functions to stream and drain headers.

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
provers/mock/prover.go	Updated SetupHeadersForUpdate to use a stream channel instead of a slice.
core/provers.go	Updated the interface for SetupHeadersForUpdate to return a stream channel; comment still references slice.
core/headers.go	Refactored to drain the header stream using a new helper function.
core/header-stream.go	New file providing helper functions to create and drain header streams.
core/channel-upgrade.go	Refactored to handle the stream-based header output by draining the channel.
chains/tendermint/prover.go	Modified SetupHeadersForUpdate to return a header stream consistently with other prover implementations.

Comments suppressed due to low confidence (1)

core/provers.go:51

• The documentation still refers to a header slice, but the function now returns a channel stream. Please update the comment to reflect the new return type accurately.

	// SetupHeadersForUpdate returns the finalized header and any intermediate headers needed to apply it to the client on the counterpaty chain

[siburu]

@bluele I have converted DrainHeaderStream into SetupHeadersForUpdateSync, which cancels a context passed to SetupHeaderForUpdate in the end. Could you review the code again?

[bluele]

@siburu LGTM👍