fix(windows): doctor ext_dir junction false-positive + hourly update check (1.12.1)

[devhardiyanto]

What

Patch 1.12.1 bundling two small changes:

1. phpvm doctor no longer reports a spurious extension_dir mismatch on a correctly configured Windows install.
2. The "update available" check now runs hourly instead of once per day, so new releases surface faster.

Why

1. Reported from real usage: doctor flagged versions\<cur>\ext (what fix-ini writes into php.ini) as not matching current\ext (active build path). current is a junction to versions\<cur> — same folder — so it was a false positive that even phpvm fix-ini couldn't clear, misleading every user.
2. With a 24h cache, a freshly published release could take up to a day to show in the banner. Requested: make it feel near-realtime.

How

1. Extract Test-ExtDirMatch accepting either spelling of the active version's ext folder (junction or version-specific, trailing-slash tolerant); doctor uses it. Unit-tested.
2. Drop PHPVM_CHECK_INTERVAL 86400 → 3600 on both OSes. Kept the once-per-interval throttle — no network call on every command (per-command checking would add latency and hammer GitHub).

Note: the doctor false-positive is Windows-only. Linux doctor checks that extension_dir exists (-d) rather than string-comparing paths, so it was never affected — no Linux change needed there.

Changes

• windows/phpvm.ps1 — Test-ExtDirMatch helper + doctor uses it; check interval 24h → 1h
• linux/phpvm.sh — check interval 24h → 1h
• tests/windows/Doctor.Tests.ps1 — 5 unit tests for the helper
• version bump 1.12.0 → 1.12.1 (5 files)

Testing Done

• Unit test lewat — Pester 81/81, PSScriptAnalyzer clean, version-consistency PASS
• Manual — reproduced the reporter's setup; doctor now reports extension_dir matches active build