chore(deps)!: upgrade to utopia-php/cache 4.x

[loks0n]

utopia-php/cache 4.0.0 is a constraint-only release: it moves cache onto utopia-php/pools 2.x, and its own public API is byte-identical to 3.4.0. So this needs no code changes here — only the requirement widening, plus the resulting lock refresh (cache 3.0.0 → 4.0.0, pools 1.0.3 → 2.0.1, telemetry 0.3.0 → 0.4.5).

Needed so that appwrite/appwrite can move to pools 2 — utopia-php/domains pins cache ^3.0 and blocks resolution (it also blocks utopia-php/dns, which reaches cache through this package).

🤖 Generated with Claude Code

[greptile-apps]

Greptile Summary

This PR aligns the package with the PHP and dependency requirements of utopia-php/cache 4.x.

• Raises the declared minimum PHP version from 8.3 to 8.4.
• Removes PHP 8.3 from the CI test matrix.
• Upgrades cache to 4.x and refreshes pools and telemetry in the lock file.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
composer.json	Raises the PHP requirement to 8.4 and upgrades the cache dependency constraint to 4.x, resolving the previously reported compatibility mismatch.
.github/workflows/test.yml	Aligns CI coverage with the newly declared PHP 8.4 minimum.
composer.lock	Refreshes the locked cache, pools, and telemetry packages and records the PHP 8.4 platform requirement.

_{Reviews (4): Last reviewed commit: "chore: refresh lock content-hash after P..." | Re-trigger Greptile}