Upgrade PHP to 8.5 and validators to 0.3.*

[Meldiron]

Upgrades utopia-php/validators from 0.2.* to 0.3.* and bumps PHP requirement to >=8.5.

[greptile-apps]

Greptile Summary

This PR bumps the PHP platform requirement from >=8.1 to >=8.5 and upgrades utopia-php/validators from 0.2.* to 0.3.*, with the Dockerfile's build/runtime image updated to match (php:8.5-cli-alpine). The validators 0.3.0 release introduces no breaking changes to the Validator base class interface that this library extends.

• Dockerfile: All build stages now inherit from php:8.5-cli-alpine; PHP extension version pins (zstd, brotli, snappy, lz4) updated to commits/tags compatible with PHP 8.5.
• composer.json / composer.lock: PHP constraint and validators dependency updated consistently; validators 0.3.0 itself now declares php: >=8.5, aligning with the new platform requirement.

Confidence Score: 5/5

Straightforward dependency and platform version bump with all three files updated consistently — safe to merge.

The Dockerfile, composer manifest, and lock file are all aligned on PHP 8.5. The validators 0.3.0 upgrade introduces no breaking changes to the Validator base class, which is the only part of that library this codebase depends on. No logic changes were made.

No files require special attention.

Important Files Changed

Filename	Overview
Dockerfile	Base image for compile stage (and all inheriting stages) updated from php:8.3-cli-alpine to php:8.5-cli-alpine; PHP extension version pins updated to newer commits/tags compatible with PHP 8.5.
composer.json	PHP platform requirement raised from >=8.1 to >=8.5; utopia-php/validators bumped from 0.2.* to 0.3.* which has no breaking changes to the Validator base class used by this library.
composer.lock	Lock file regenerated to reflect utopia-php/validators 0.3.0 (now requiring php: >=8.5, consistent with the updated platform constraint) and updated content-hash.

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