refactor: use xxh hash

[larskemper]

resolves #13391

use xxh128 where possible for better performance & use Hasher util for all hashing uses.

[Copilot]

Pull Request Overview

This PR replaces direct usage of PHP's native hash functions (md5(), hash(), hash_file()) with Shopware's Hasher utility class across the codebase. This change aligns with Shopware's coding standards and centralizes hash generation through a framework-provided utility.

• Replaces \md5() and \hash('md5', ...) calls with Hasher::hash()
• Updates phpstan configuration to remove exceptions for hash function usage
• Standardizes hash generation across converters, resolvers, and services

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/Profile/Shopware/Media/Strategy/Md5StrategyResolver.php	Replaces \md5() with Hasher::hash() for path hashing
src/Profile/Shopware/Converter/ShippingMethodConverter.php	Updates hash generation for availability rule data
src/Profile/Shopware/Converter/PropertyGroupOptionConverter.php	Replaces multiple \hash('md5', ...) calls with Hasher::hash() for property group identifiers
src/Profile/Shopware/Converter/ProductPropertyRelationConverter.php	Updates property group option mapping hash generation
src/Profile/Shopware/Converter/ProductOptionRelationConverter.php	Updates product option mapping hash generation
src/Profile/Shopware/Converter/ProductConverter.php	Replaces hash calls in option and translation mapping methods
src/Profile/Shopware/Converter/OrderConverter.php	Updates deep link code generation with Hasher::hash()
src/Migration/Service/MigrationDataConverter.php	Updates checksum generation for migration data
src/Migration/Media/Processor/HttpDownloadServiceBase.php	Replaces hash_file() with Hasher::hash() for file hash generation
src/Migration/Converter/Converter.php	Updates checksum generation in base converter class
phpstan.neon.dist	Removes ignore rules for hash function usage that are no longer needed

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