[codex] Expose same-multi swap spent amounts

[caydyan]

Summary

• add x-amount-spent to swap-x-for-y-same-multi responses
• add y-amount-spent to swap-y-for-x-same-multi responses
• update generated Clarigen types and add router tests that compare the new fields with results[].in totals and token balance deltas

Why

The same-token multi-swap helpers already aggregate output and per-hop in/out results, but their top-level response did not expose the aggregate input actually consumed. This makes partial-fill accounting harder for callers and integrators. The simple multi-swap entrypoints already return top-level input/output fields; this brings the same-multi helpers in line with that behavior.

Validation

• git diff --check
• clarinet check contracts/dlmm-swap-router-v-1-1.clar passes with the repo's existing warnings
• npx vitest run tests/routers/swap-router.test.ts is currently blocked before tests execute by an existing trait-signature error: invalid signature for method get-pool-for-add regarding trait's specification <dlmm-pool-trait>