fix(syncer): refetch latest da height instead of da height +1

[julienrbrt]

Overview

If the latest da height contained more blocks, and one of those blocks got executed, without p2p the node will be stuck as it won't refetch the da heigth. We should re fetch daHeight-1 on start.

In our case, the cache was as well further, which is fine, but because we don't hold blocks in cache, we don't need this at all.

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The latest Buf updates on your PR. Results from workflow CI / buf-check (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	⏩ skipped	✅ passed	✅ passed	Mar 25, 2026, 11:10 AM