refactor(move): settle a device claim in its own module - #2574

Summary

Moves claim settlement out of src/daemon/device-claims.ts into src/daemon/device-claim-settlement.ts: what the claim file says before an acquisition writes its own record, how a foreign claim is settled, the ownership predicates, and the conflict and supersede diagnostics. The resolution gains a held arm so the settlement module stops naming the public acquire result, and claimHeldDevice maps it back to acquired. DeviceClaimSessionOwnership and ownershipFromClaim move to device-claim-record.ts, the record they read.

Tests move with the code they cover, which also leaves device-claims.test.ts at 767 lines instead of 940. 772 gross lines, no behavior change: the 6 moved tests pass unchanged and the public surface keeps its existing re-exports.

Part 1 of 3 for #2538; #2575 and #2570 build on it.

Validation

Tested at 5749359a00. pnpm check:layering passes, including the committed enumeration of the new module. pnpm check:fallow --base origin/main reports no issues in the changed files. Typecheck and lint pass. vitest related across all six changed files: 254 files, 1,629 tests passed. No device-facing behavior changes, so no simulator or device run applies.