HQD-142: Add deprecated() marker and isDeprecated() to PriceTypeDefinition

[VadymHrechukha]

Summary by CodeRabbit

New Features

• Added deprecation status tracking for price types. The system can now identify which price types are marked as deprecated, improving compatibility handling during invoice regeneration and supporting backward-compatible operations.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 102c32ef-a759-484c-84a2-9591cfad388e

📥 Commits

Reviewing files that changed from the base of the PR and between 3ebe910 and 4665c6a.

📒 Files selected for processing (2)

• src/product/price/PriceTypeDefinition.php
• src/product/price/PriceTypeDefinitionInterface.php

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📝 Walkthrough

Walkthrough

The PR adds internal deprecation state tracking to PriceTypeDefinition. A private boolean field stores the deprecated state, the existing deprecated() builder method now sets this flag, and a new public isDeprecated() accessor exposes the state. The interface contract is updated to declare the new accessor method.

Changes

Deprecation state tracking

Layer / File(s)	Summary
Deprecation state accessor API src/product/price/PriceTypeDefinitionInterface.php	Interface declares the new isDeprecated(): bool method to expose the deprecation flag value.
Deprecation state field and accessor src/product/price/PriceTypeDefinition.php	Implementation adds a private boolean field to store deprecation state, updates the deprecated() builder method to set this flag, and introduces the isDeprecated() accessor to return the flag value.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~5 minutes

Possibly related PRs

• hiqdev/php-billing#119: Extends the same PriceTypeDefinitionInterface/PriceTypeDefinition by implementing the internal deprecated flag and adding isDeprecated(): bool method, building on the deprecation API additions.

Poem

🐰 A flag, a field, a truth to hold,

When prices age and grow too old,

Mark deprecated with care so neat,

Making invoice tracks complete! ✨

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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