feat: add device-aware lease contracts

[thymikee]

Summary

Add provider- and device-aware remote lease contracts so follow-on proxy/session work can share one lease metadata model.

Details: introduces ADR 0007 and CONTEXT vocabulary, extends lease payload/config/state types with optional leaseProvider, deviceKey, and clientId, updates LeaseRegistry to keep DeviceLease as the canonical model with a SimulatorLease compatibility alias, and rejects same backend/provider/device contention with DEVICE_LEASE_BUSY while preserving backend-only leases.

Also adds shared lease-context helpers for request/session fallback and diagnostics consumers. Touched-file count: 15. Scope expanded slightly from the original list to include src/daemon/request-admission.ts, src/remote-config-core.ts, and src/daemon/__tests__/lease-context.test.ts so the new shared contract is parsed and applied consistently. No connect proxy behavior or session cleanup is implemented here.

Validation

Verified with pnpm format, focused lease/context/handler tests, request execution scope tests, remote config option-schema tests, vocabulary grep, and pnpm typecheck.

[github-actions]

Size Report

Metric	Base	Current	Diff
JS raw	1.3 MB	1.3 MB	+3.3 kB
JS gzip	437.1 kB	437.8 kB	+701 B
npm tarball	575.0 kB	576.0 kB	+970 B
npm unpacked	1.9 MB	1.9 MB	+4.4 kB

Startup median (7 runs, lower is better):

Scenario	Base	Current	Diff
CLI --version	27.3 ms	27.6 ms	+0.4 ms
CLI --help	47.4 ms	48.9 ms	+1.5 ms

Top changed chunks:

Chunk	Raw diff	Gzip diff
dist/src/9722.js	+3.2 kB	+820 B
dist/src/cli.js	-726 B	-361 B
dist/src/cli-help.js	-151 B	-55 B

[thymikee]

Closing as superseded by #890, which integrates the lease contract, proxy connect, session admission/expiry, and diagnostics work. Please continue review there.

[github-actions]

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2026-06-26 11:35 UTC