docs: update docs and resource-lifecycle example for alpha.10 cacheTime

[mahyarmlk]

Summary

Update documentation and the resource-lifecycle example for the alpha.10 release, which shipped support.

Changes

Version bumps (alpha.9 → alpha.10)

• README.md — install commands, current alpha version, limitation descriptions
• docs/Quickstart.md — install commands and pin version reference
• docs/agent/RELEASE-STATE.md — version table

Documentation verification

• docs/Resources.md — cacheTime docs were already correct (nested API, single-runtime only, proper scope limitations)
• docs/proposals/Resource-Cache-And-Stale-Semantics.md — already references Phase 3 (PR docs: Phase 3 cacheTime single-runtime design #126, PR feat(core): resource cache phase 3 — cacheTime single-runtime eviction #127, alpha.10)

Example changes (examples/resource-lifecycle)

Two new resources demonstrating cacheTime:

• timeEvictTeam (non-keyed, cacheTime: 1000ms)
• keyedTimeEvict (keyed, cacheTime: 1000ms)

New actions: Invalidate time-evict team, Load keyed time-evict (team_b), Invalidate keyed time-evict

Example tests

Four new cacheTime tests:

• invalidate keeps stale value before cacheTime expires
• cacheTime expiry resets active entry to idle
• cacheTime works per key for keyed resource
• no-arg reload after cacheTime eviction reuses last context

Validation

• pnpm test — all 446 tests pass (232 core + 113 dom + 72 router + 21 testing + 22 resource-lifecycle + others)
• pnpm typecheck — all packages pass
• pnpm build — all packages build
• pnpm lint — clean
• pnpm changeset status — no new changesets (docs/example only)

Scope

• Docs/example only — no core runtime changes, no DOM/router/testing changes, no changeset, no version bumps