rollup-boost/v0.7.15

What Changed

• rollup-boost now maintains a per-slot mapping from the L2 client's payload id to the builder's payload id on FCU, and can handle the case when the builder and local payload ids don't match
• rollup-boost-types public API changes in PayloadTrace and PayloadTraceContext

Observability

• The builder_has_payload metric label is retained, but only returns true if the builder returned a payload_id instead of any successful RPC call (such as responding with SYNCING).
• Flashblocks "Payload ID mismatch" log severity downgraded from error to debug, since the mismatch is an expected and handled case

New Contributors

• @yashvardhan-kukreja made their first contribution in #451
• @noot made their first contribution in #450
• @0x00101010 made their first contribution in #447
• @meyer9 made their first contribution in #465
• @julio4 made their first contribution in #464

Full Changelog: rollup-boost/v0.7.14...rollup-boost/v0.7.15